JP2014515209A - Wireless communication system, network connection device and terminal device - Google Patents

Abstract

The present invention discloses a wireless communication system. One center access point CAP and at least one site STA communicating with the CAP are provided. The center access point CAP determines the structure of the current physical frame based on the scheduled transmission resource, transmits information indicating the structure to the current physical frame, and the site STA The structure of the current physical frame is determined based on the information indicating the physical frame structure, and the length of each physical frame is determined by the structure and is a non-fixed value. The present invention further provides two wireless communication devices.

Description

  This application claims the priority of a Chinese patent application whose filing date is March 25, 2011, the application number is 2011010074598.5, and the title of the invention is “Method and system for adjusting demodulation pilot in a wireless communication system”. Yes, the entire content of the prior application is presented in this application.

  This application claims the priority of a Chinese patent application whose filing date is March 31, 2011, the application number is 2011010081193.4, and the title of the invention is “wireless communication method, system and equipment”. The entire contents of the application are presented in this application.

  This application claims the priority of a Chinese patent application whose filing date is May 19, 2011, the application number is 201110130194.3, and the name of the invention is “communication system”. Represented in this application.

  This application claims the priority of a Chinese patent application whose filing date is January 16, 2012, the application number is 20120101924.2, and the title of the invention is “wireless communication method and device”. The entire contents are presented in this application.

  This application claims the priority of a Chinese patent application whose filing date is February 16, 2012, the application number is 2012010035552.7, and the title of the invention is “wireless communication method and device”. The entire contents are presented in this application.

  This application claims the priority of a Chinese patent application whose filing date is February 21, 2012, the application number is 20121200416555.4, and the title of the invention is “devices used for wireless communication system and wireless communication”. The entire contents of the prior application are expressed in the present application.

  This application claims the priority of a Chinese patent application whose filing date is February 21, 2012, the application number is 2012120041650.1, and the name of the invention is “device used for wireless communication”. The entire contents of are expressed in this application.

  This application claims the priority of a Chinese patent application whose filing date is February 21, 2012, the application number is 2012120041651.6, and the title of the invention is “device used for wireless communication”. The entire contents of are expressed in this application.

  The present invention belongs to the communication field, and particularly relates to a wireless communication system, a network connection device, and a terminal device.

  2. Description of the Related Art In recent years, wireless communication systems applied to medium and short-range communication are derived from wireless LAN technology WiFi based on the 802.11 standard, Bluetooth (registered trademark) system based on the 802.15 standard, and a mobile communication system. Femto technology for indoor applications.

  WiFi technology compliant with the 802.11 standard is currently the most widely used wireless network transmission technology. Mainly applied to a wireless LAN environment, application scenes are mostly indoors and may be applied to outdoor environments. The 802.11 system was first developed from 802.11b based on CDMA transmission mechanism to 802.11a and 802.11g based on OFDM technology. The latest 802.11n version introduced multi-antenna (MIMO) technology so that the peak rate of the 802.11n physical layer reaches 600 MbPS. In the MAC layer, a carrier sense multiple access with collision avoidance (CSMA / CA) protocol adapted to a random multiple address has been adopted for the 802.11 system. The protocol uses a “contention” mechanism, and the access point CAP and each terminal or STA acquire the right to use the air interface that is open due to the competition. If the competition is successful, the air interface is monopolized by the competition success CAP within the transmission period. Because the contention mechanism is used, the access network does not need to centrally control the nodes. Both CAP and STA are equal in terms of competing air interface resources. WiFi systems are inefficient and waste a lot of radio resources. The root cause of this problem is a random multiple access mechanism in which the CSMA / CA mechanism is based on contention, between an access point (CAP, Access Point) and a station (STA, station), or between different STAs. Contends for the right to use radio resources through the CSMA / CA mechanism and competes for radio channels. In this case, a collision occurs and wastes radio resources. In order to avoid collision, the CSMA / CA mechanism requires that the CAP or STA evacuate randomly when competing for a radio channel. Vacant but not used. This is also a huge waste of radio channels. For the above reasons, the 802.11 system is inefficient. For example, in an 802.11g system, the peak rate of the physical layer can reach 54 MbPs, but the reachable rate under large-capacity packet download traffic (eg, FTP Download) in the TCP layer is 30 MbPs or less (small capacity) Under packet download traffic, the overhead rate has increased, so the reachable rate is lower). Although the above-described defects exist, the 802.11 system is flexible and does not depend on a centralized control mechanism, so that the cost of the device can be reduced.

  Femto technology conforming to the 3GPP standard is a new indoor technology developed from mobile communication systems. According to 3G system data statistics, about 70% of data traffic is done indoors, so indoor high-rate data access strategy is particularly important. The Femto base station is called a micro base station, has a small volume (approximate to Wi-Fi), and has a good installation flexibility. Since it has been developed from mobile communication systems, Femto base stations have almost all the features of mobile communication systems. Femto devices simply reduced device processing capabilities and device costs to match application scene features such as limited coverage and fewer access users. Considering the duplex mode, the Femto base station is divided into two types of duplex modes, FDD and TDD, as in the mobile communication system. In FDD, uplink downlink carrier resources are symmetric, but due to the asymmetric traffic feature of uplink downlink data traffic in data traffic, the FDD system has a certain amount of resource waste in data traffic. In the TDD system, the uplink downlink works on the same carrier and separates time resources to allocate different radio resources to the uplink downlink, so the asymmetric data traffic required for uplink downlink traffic compared to FDD Can be applied well to. However, in TDD duplex mode of mobile communication systems (including Femto system), uplink and downlink resources are statically allocated, and each type of data traffic with different requests, eg web page browsing, mobile video, mobile games, It is difficult to realize dynamic adaptation of traffic demand and resource allocation for machine-to-machine (M2M). Compared to Wi-Fi, Femto employs a centralized control mechanism based on scheduling, and there is no wasting of radio resources due to contention collisions and random evacuation between base stations or CAPs and terminals, or between terminals. Is expensive. In Femto technology, the multiple access mechanism allocates access resources orthogonal to different STAs according to time, frequency, and codeword. This is inherently different compared to CSMA / CA random multiple access towards competition. Femto technology needs to centrally control nodes and allocate access resources orthogonal to each other to STAs, and different STAs can be transmitted simultaneously by time, frequency, codeword and spatial multiplexing air interface resources. In the physical layer technology, Femto technology based on 3G system adopts CDMA transmission mechanism, and adopts OFDMA transmission mechanism to Femto technology of LTE or WiMAX system. Since the OFDMA technology is the mainstream technology for future broadband wireless communication systems, the Femto technology referred to in the present invention refers to LTE or WiMAX Femto. The Femto referred to in the present invention mainly refers to the TDD Femto technology because the TDD technology can be better applied to the uplink downlink asymmetric traffic of the mobile Internet compared to the FDD technology.

  The Femto system also communicates to the uplink and downlink by scheduling and allocates radio resources to different terminals, but with a statically configured frame structure, it is impossible to flexibly allocate radio resources to the uplink and downlink. Inability to self-adapt to traffic changes with small granularity. If the balance between traffic and resource placement is lost, it will cause long queues, poor user experience, or wasted channel capacity.

  In view of the above, the technical problem to be solved by the present invention is to provide a wireless communication system, a network connection device, and a terminal device.

  In order to provide a basic understanding of some aspects of the embodiments disclosed in the present invention, a brief overview is provided below. This general section is not generally commented, nor does it identify key / critical constituent elements or delineate the protection scope of these examples. Its sole purpose is to present concepts in a simplified form and serve as the basis for the detailed description below.

  The technical solution relating to the present invention is realized as follows.

A wireless communication system,
One center access point CAP,
Comprising at least one site STA communicating with the CAP;
The center access point CAP determines a current physical frame structure based on a scheduled transmission resource, and transmits information indicating the structure to the current physical frame,
The site STA determines the current physical frame structure based on information indicating the current physical frame structure in the current physical frame;
Among them, the length of each physical frame is determined by its structure and is a non-fixed value.

Network equipment,
Including an arrangement unit and a first communication unit;
The placement unit determines a current physical frame structure based on scheduled transmission resources;
The first communication unit transmits information indicating a current physical frame structure in a current physical frame, communicates with at least one terminal device;
Transmitting information indicating the current physical frame structure in the current physical frame, communicating with at least one terminal device,
Among them, each physical frame length depends on the structure and is a non-fixed value.

  In one embodiment, the structure for determining the current physical frame structure specifically arranges a synchronization preamble sequence and a system information channel of information indicating the current physical frame structure in the current physical frame.

In one embodiment, the first communication unit transmits the preamble sequence and transmits information indicating the current physical frame structure on the system information channel.
In one embodiment, the structure for determining the current physical frame structure is, specifically, a synchronization preamble sequence and a system information channel for information indicating the current physical frame structure are arranged and selected in the current physical frame. Therefore, at least one of the plurality of channels is arranged in the current physical frame.

In one embodiment, the plurality of channels are:
A first downlink transmission channel for transmitting downlink traffic and / or downlink signaling and / or uplink traffic feedback;
A downlink exploration channel for transmitting downlink exploration signals;
A second downlink transmission channel for transmitting downlink traffic, and / or downlink signaling, and / or uplink traffic feedback.

  Preferably, the first communication unit transmits a preamble sequence, transmits information indicating a current physical frame structure on a system information channel, and performs a related transmission on a selectively arranged channel.

  Preferably, in the structure for determining the current physical frame structure, a control channel for transmitting information indicating a transmission format of a channel occupying the transmission resource is allocated to the current physical frame.

Preferably, the first communication unit transmits the preamble sequence, transmits information indicating a current physical frame structure on a system information channel, and allocates and schedules transmission resources and occupies transmission resources on the control channel. Transmitting information indicating the transmission format of the channel to be
Perform related transmission on selectively placed channels.

Preferably, the first communication unit transmits a preamble sequence, transmits information indicating a part of a current physical frame structure in the system information channel, and includes at least a length of time of the control channel, Send information indicating the current physical frame structure of the other part in, transmit transmission resource allocation and scheduling on the control channel, and information indicating the transmission format of the channel occupying the transmission resource,
Perform related transmission on selectively placed channels.

Preferably, the plurality of channels are
An uplink exploration channel for transmitting uplink exploration signals;
An uplink scheduling request channel for transmitting an uplink scheduling request;
An uplink transmission channel for transmitting uplink traffic, and / or uplink signaling, and / or downlink traffic feedback, and / or downlink CQI feedback, and / or downlink CSI feedback;
And an uplink random access channel for triggering new user access.

Preferably, the plurality of channels are
An uplink search channel for transmitting an uplink search signal, an uplink scheduling request channel for transmitting an uplink scheduling request, and
An uplink transmission channel for transmitting uplink traffic and / or uplink signaling and / or downlink traffic feedback; and a CQI feedback channel for transmitting downlink CQI feedback;
A CSI feedback channel for transmitting downlink CSI feedback; and
And an uplink random access channel for triggering new user access.

  Preferably, the first communication unit transmits a preamble sequence, transmits information indicating a current physical frame structure on a system information channel, and performs relational reception on a selectively arranged channel.

  Preferably, in the structure for determining the current physical frame structure, a control channel for transmitting information indicating a transmission format of a channel occupying the transmission resource is allocated and scheduled in the current physical frame.

  Preferably, the first communication unit transmits the preamble sequence, transmits information indicating a current physical frame structure on a system information channel, and allocates and schedules transmission resources and occupies transmission resources on a control channel. Information indicating the transmission format of the channel is transmitted, and related reception is performed on the selectively arranged channels.

Preferably, the first communication unit transmits the preamble sequence, transmits information indicating a part of a current physical frame structure in a system information channel, and includes at least a length of time of a control channel, The control channel transmits information indicating the current physical frame structure of other parts, the control channel transmits information indicating the allocation and scheduling of transmission resources, and the transmission format of the channel occupying the transmission resources,
It is characterized in that the related reception is performed on the selectively arranged channels.

  Preferably, the control channel and the system information channel divide and multiplex resources by any one of time division multiplexing, frequency division multiplexing, code division multiple access, or a combination method.

A terminal device,
Including an analysis unit and a second communication unit;
The analysis unit analyzes information indicating a current physical frame structure in a current physical frame to determine a current physical frame structure;
The second communication unit communicates with a network device in a current physical frame;
Among them, each physical frame length depends on its structure and is a non-fixed value.

  In one embodiment, the current physical frame comprises a preamble sequence and a system information channel having information indicating the current physical frame structure.

  Preferably, the second communication unit receives the preamble sequence and receives information indicating a current physical frame structure on a system information channel.

  Preferably, the current physical frame includes a preamble sequence, a system information channel having information indicating a current physical frame structure, and at least one selectively arranged channel.

  Preferably, the selectively arranged channels are an uplink search channel for transmitting an uplink search signal, an uplink scheduling request channel for transmitting an uplink scheduling request, an uplink traffic, and / or Or uplink transmission channel for transmitting uplink signaling, and / or downlink traffic feedback, and / or downlink CQI feedback, and / or downlink CSI feedback, and uplink random for triggering new user access And access channel.

  Preferably, the selectively arranged channels are an uplink search channel for transmitting an uplink search signal, an uplink scheduling request channel for transmitting an uplink scheduling request, an uplink traffic, and / or Or an uplink transmission channel for transmitting uplink signaling and / or downlink traffic feedback, a CQI feedback channel for transmitting downlink CQI feedback, and a CSI feedback channel for transmitting downlink CSI feedback And an uplink random access channel for triggering new user access.

Preferably, the second communication unit receives a preamble sequence and receives information indicating a current physical frame structure on a system information channel;
Performing a related transmission on at least one selectively arranged channel.

  Preferably, the uplink random access channel, the uplink transmission channel, and the uplink scheduling request channel divide and multiplex resources in one of time division multiplexing, frequency division multiplexing, code division multiple access, or a combination scheme.

  Preferably, the current physical frame structure further includes a control channel for transmitting information indicating transmission resource allocation and scheduling, and a transmission format of a channel that occupies the transmission resource.

Preferably, the second communication unit receives a preamble sequence, receives information indicating a current physical frame structure on a system information channel, and allocates and schedules transmission resources and uses transmission resources on a control channel. Receiving information indicating the transmission format of
Performing a related transmission on at least one selectively arranged channel.

Preferably, the second communication unit receives a preamble sequence, receives information indicating a part of a current physical frame structure in a system information channel, and includes at least a length of time of a control channel, Receive information indicating the current physical frame structure of other parts in the channel, receive transmission resource allocation and scheduling on the control channel, and information indicating the transmission format of the channel occupying the transmission resource,
Performing a related transmission on at least one selectively arranged channel.

  Preferably, the selectively arranged channel transmits a downlink search signal and a first downlink transmission channel for transmitting downlink traffic and / or downlink signaling and / or uplink traffic feedback. A downlink exploration channel for transmitting and a second downlink transmission channel for transmitting downlink traffic and / or downlink signaling and / or uplink traffic feedback.

Preferably, the second communication unit receives a preamble sequence and receives information indicating a current physical frame structure on a system information channel;
Perform related reception on at least one selectively arranged channel.

  Preferably, the current physical frame structure further includes a control channel for transmitting information indicating transmission resource allocation and scheduling, and a transmission format of a channel that occupies the transmission resource.

Preferably, the second communication unit receives a preamble sequence, receives information indicating a current physical frame structure on a system information channel, and allocates and schedules transmission resources and uses transmission resources on a control channel. Receiving information indicating the transmission format of
Perform related reception on at least one selectively arranged channel.

Preferably, the second communication unit receives a preamble sequence, receives information indicating a part of a current physical frame structure in a system information channel, and includes at least a length of time of a control channel, Receive information indicating the current physical frame structure of other parts in the channel, receive transmission resource allocation and scheduling on the control channel, and information indicating the transmission format of the channel occupying the transmission resource,
Perform related reception on at least one selectively arranged channel.

In one embodiment, in the network device and the terminal device,
The information indicating the current physical frame structure includes information indicating the existence of the first channel.

  Preferably, the first channel is a downlink search channel for transmitting a downlink search signal.

  Preferably, the information indicating the current physical frame structure includes information indicating a time length of the second channel, and the time length of the second channel is zero or more.

  Preferably, the second channel is a downlink transmission channel or an uplink transmission channel.

  Preferably, the first channel is an uplink random access channel for triggering new user access.

In one embodiment, in the network device and the terminal device,
The information indicating the current physical frame structure includes information indicating the existence of the first channel and the length of time.

  Preferably, the first channel is an uplink scheduling request channel for triggering uplink transmission resource scheduling.

  Preferably, the first channel is an uplink search channel for transmitting an uplink search signal.

  Preferably, the information indicating the current physical frame structure includes information indicating a time length of the second channel, and the time length of the second channel is zero or more.

  Preferably, the second channel is a downlink transmission channel or an uplink transmission channel.

In one embodiment, in the network device and the terminal device,
The information indicating the current physical frame structure includes information indicating a time length of the first channel, and the time length of the first channel is zero or more.

  Preferably, the first channel is a control channel for transmitting information indicating a transmission format of a channel allocating and scheduling transmission resources and occupying the transmission resources.

  Preferably, the first channel is a downlink transmission channel.

  Preferably, the information indicating the current physical frame structure includes information indicating the existence of the second channel and the length of time.

  Preferably, the second channel is an uplink search channel for transmitting an uplink search signal.

  Preferably, the information indicating the current physical frame structure includes information indicating the existence of the second channel.

  Preferably, the second channel is a downlink search channel for transmitting a downlink search signal.

  Preferably, the first channel is an uplink transmission channel.

  Preferably, the information indicating the current physical frame structure includes information indicating the existence of the second channel and the length of time.

  Preferably, the second channel is an uplink search channel for transmitting an uplink search signal.

  Preferably, the information indicating the current physical frame structure includes information indicating the existence of the second channel.

  Preferably, the second channel is a downlink search channel for transmitting a downlink search signal.

  The proposal related to the present invention can realize the following functions.

  1. The CAP centrally schedules related STAs and allocates radio resources to different STAs, thereby avoiding waste of radio resources due to contention mechanisms.

  2. Dynamic TDD frame length and frame structure allocation, flexible allocation of uplink and downlink resource ratios, improve system efficiency for indoor locations, save control and scheduling resources, transmission resources By dynamically allocating uplink and downlink radio resources based on requirements, it will be adapted to the uplink and downlink transmission requirements of various types and various characteristics of data services, and there is no fixed frame size commitment. The structure of the frame is flexible and changeable, and reduces the complexity to implement.

  3. Radio resources are allocated to users and uplink / downlink communication with small granularity, and the resource allocation can adapt well to traffic changes, and the radio resources allocated to each user and uplink / downlink communication can request traffic. And can adapt well to channel transmission conditions.

  4. Not only can it adapt to changes in large traffic rate requirements at different terminals, but it can also adapt well to dynamic changes in radio channels. The present invention is adaptable to various dynamic changes in data traffic requirements, and dynamically matches channel capacity with traffic requirements, resulting in superior system efficiency. It is possible to dynamically allocate radio resources to different terminals, keeping balance between traffic demand and channel characteristics, dynamically partitioning uplink and downlink link resources, and considering the condition of link self-adaptation it can.

  5. In addition to the above features, the present invention also considers channel state information delays, requirements for processing times of devices with different grades, and the like. All of the above considerations increase system efficiency and performance.

  6. The feedback of this frame can be realized and the delay of MU-MIMO feedback is reduced.

  7. The scheduling of this frame can be realized, and the traffic scheduling delay is reduced.

  For the above and related purposes, one or more embodiments include the features that are described in detail below and are particularly pointed out in the claims. The following description and the drawings illustrate some illustrative aspects in detail, and only a portion of the various schemes that can be used in principle in each embodiment are shown. Other advantages and novelty features will become apparent when considered in conjunction with the drawings as described in detail below, and the disclosed embodiments include all of these aspects and their equivalents.

FIG. 1 is a schematic structural diagram of a radio communication system in an embodiment of the present invention. FIG. 2 is a schematic diagram of a network connection device structure in the embodiment of the present invention. FIG. 3 is a structural schematic diagram of the terminal device in the embodiment of the present invention. FIG. 4 is a structural schematic diagram of a physical frame in Embodiment 1 of the present invention. FIG. 5 is a structural schematic diagram of a physical frame in Embodiment 2 of the present invention. FIG. 6a is a schematic diagram of the first type structure of the first physical frame in Embodiment 3 of the present invention. FIG. 6B is a structural schematic diagram of the second physical frame in Embodiment 3 of the present invention. FIG. 7 is a schematic diagram of the second type structure of the first physical frame according to the third embodiment of the present invention. FIG. 8 is a structural schematic diagram of the second physical frame in the embodiment 4 of the present invention. FIG. 9 is a structural schematic diagram of a physical frame in the fifth embodiment of the present invention. FIG. 10 is a structural schematic diagram of a physical frame in Embodiment 6 of the present invention. FIG. 11 is a structural schematic diagram of a physical frame in Embodiment 7 of the present invention. FIG. 12 is a structural schematic diagram of a physical frame in Embodiment 8 of the present invention. FIG. 13 is a structural schematic diagram of a physical frame in Embodiment 9 of the present invention. FIG. 14 is a schematic diagram illustrating transmission of an uplink protection interval reserved in advance by CAP according to the present invention. FIG. 15 is a structural schematic diagram of a physical frame in the tenth embodiment of the present invention. FIG. 16 is a schematic diagram of multiple resources of an uplink transmission channel, an uplink scheduling request channel, and an uplink random access channel. FIG. 17 is a schematic diagram of control channel and system information channel resource multiplex resources. FIG. 18 is a flowchart showing a resource scheduling method in the embodiment of the present invention. FIG. 19 is a flowchart showing a downlink scheduling and transmission process in Application Example 1 of the present invention. FIG. 20 is a schematic diagram showing a resource scheduling process in Application Example 1 of the present invention. FIG. 21 is a flowchart showing an uplink scheduling and transmission process in the first application example of the present invention. FIG. 22 is a schematic diagram showing a resource scheduling process in Application Example 2 of the present invention. FIG. 23 is a flowchart showing an uplink scheduling and transmission process in the third application example of the present invention. FIG. 24 is a schematic diagram showing a resource scheduling process in Application Example 3 of the present invention. FIG. 25 is a flowchart illustrating an uplink scheduling and transmission process according to Application Example 4 of the present invention. FIG. 26 is a schematic diagram showing a resource scheduling process in Application Example 4 of the present invention. FIG. 27 is a schematic diagram of a system frame structure of an uplink / downlink scheduling transmission process in Application Example 5 of the present invention. FIG. 28 is a schematic diagram of a downlink signaling / feedback transmission channel multiplexed DL-TCH resource. FIG. 29 is a structural schematic diagram of the first uplink signaling / feedback channel. FIG. 30 is a schematic diagram illustrating an example of division multiplexing. FIG. 31 is a schematic diagram of an uplink scheduling request channel generation method. FIG. 32 is a sequence of the maximum long linear feedback shift register of the PN sequence. FIG. 33 shows a format of the first uplink random access channel. FIG. 34 shows a format of the second uplink random access channel. FIG. 35 shows a format of the third uplink random access channel.

  The following description and drawings are sufficient to enable those skilled in the art to practice the specific mode of carrying out the invention. Other implementations can include configuration, logic, electricity, process, and other changes. The examples represent only possible changes. Except for explicit requests, single parts and functions can be selected and the order of operation can be changed. Parts and features of some implementations are included or replaced by parts and features of other implementations. The scope of implementations of the invention includes the full scope of the claims and all obtainable equivalents of the claims. In the present text, these implementations of the present invention are represented solely or collectively by the term “invention”. This is only for convenience. And in fact, even if one or more inventions are disclosed, the scope of the application is not automatically restricted to any single invention or invention concept.

  Employing the present invention avoids wasting radio resources caused by competing conflicts or random evacuation. Unlike conventional mobile communication systems (including next-generation mobile communication systems such as LTE and WiMax), the present invention makes it possible to flexibly change the frame structure by dynamically setting the structure of the physical frame to meet the business requirements. Accordingly, it is possible to dynamically divide up / downlink radio resources accordingly, and to better adapt to the uplink / downlink transmission requirements of data services that have a variety of types and have their own characteristics dynamically. Also, the system can provide a very small resource granularity, so it can adapt better to dynamic changes in radio channels as well as adapting to large changes in work rate requirements of different terminal devices. The frame size of the physical frame according to the present invention is non-fixed, and is determined by the structure of the physical frame, which can contribute to a reduction in control and scheduling for indoor applications, and rapid outdoor changes. Can be adapted to the demands of It can also reduce the complexity of implementation. In general, the present invention dynamically balances business requirements and channel characteristics, dynamically allocates uplink and downlink link resources, and considers link self-adaptation to dynamically adapt to different terminal equipment. Allocate radio resources.

  Since the physical frame structure according to the present invention includes the presence and time of each part in the physical frame, if the structure of the physical frame is dynamically set, it is possible to set which part is included in the physical frame. You can also set the time for each part. The frame size of the physical frame according to the present invention is determined by the structure of the physical frame and is not fixed.

  In an embodiment of the present invention, each physical frame (Frame) is based on a TDD duplex method (a specific carrier, a base station or a CAP and a terminal or an STA recombine transmission / reception of time-division multiplexing). Includes downlink (DL, Downlink, CAP to STA) subframe, protection interval and uplink (UL, Uplink, STA to CAP) subframe. The structure and time of downlink subframes and uplink subframes can be set dynamically, and the structure and frame size of each physical frame can also be changed dynamically.

  The downlink subframe includes a preamble sequence, a system information channel, a control channel, a downlink transmission channel, and a downlink search channel.

  The preamble sequence (Preamble) includes a short preamble sequence and a long preamble sequence. Among them, short preamble sequences are mainly used for frame detection, AGC, poor frequency synchronization or poor symbol synchronization. Long preamble sequences are used for precise system synchronization, channel estimation, accurate frequency synchronization, accurate symbol synchronization, and the like.

  The system information channel is used for transmission of system basic setting information. Among them, the system basic setting information includes frequency band setting, antenna setting, frame number, and the like.

  The control channel transmits information that indicates transmission resource allocation and scheduling, and the transmission format of the channel that occupies the transmission resource. Specifically, depending on the application, the control channel is one of a downlink transmission channel, a downlink search channel, an uplink transmission channel, an uplink search channel, an uplink scheduling request channel, and an uplink random access channel. Or, it designates the allocation and scheduling of a plurality of transmission resources and the transmission format of those channels.

  The downlink transmission channel is used for transmitting downlink service and / or downlink signaling and / or uplink service feedback. Accordingly, the downlink transmission channel is divided into a downlink service transmission channel, a downlink signaling channel, and an uplink service feedback channel according to functions.

  The downlink probe channel is used for transmission of downlink probe signals.

  The uplink subframe includes an uplink search channel, an uplink scheduling request channel, an uplink transmission channel, and an uplink random access channel.

  The uplink search channel is used for transmission of uplink search signals.

  The uplink scheduling request channel is used to trigger uplink transmission resource scheduling.

  The uplink transmission channel may be uplink service and / or uplink signaling transmission, and / or downlink service feedback, and / or downlink channel quality information (CQI) feedback, and / or downlink channel state information. (CSI) Used for feedback. Accordingly, the uplink transmission channel is divided into an uplink service transmission channel, an uplink signaling channel, a downlink service feedback channel, a CQI feedback channel, and a CSI feedback channel according to function. Alternatively, the CQI feedback channel and the CSI feedback channel exist independently from the uplink transmission channel.

  The uplink random access channel is used to trigger new user access.

  In the embodiment of the present invention, it is necessary to prepare a transmission / reception switching time for CAP and STA. For example: When CAP and STA switch from downlink to uplink, their radio frequency channel switches from transmitting or receiving to receiving or transmitting state. When CAP and STA switch from uplink to downlink, their radio frequency channel switches from reception or transmission to transmission or reception state. In order to prepare the above transmission / reception switching time, the physical frame structure may include a protection interval instructing downlink switching and uplink switching. Specifically, there are two types, one is a downlink protection interval (DGI) for switching from the downlink to the uplink, and one is an uplink protection interval for switching from the uplink to the downlink. (UGI). The uplink protection interval is also reserved for the CAP and STA by sending an early hold, i.e., by increasing the uplink transmission time, to hold the switch protection interval from the uplink to the downlink.

  Based on the role of each channel in the physical frame structure, the uplink scheduling request channel, the uplink random access channel, the downlink search channel, and the uplink search channel are referred to as auxiliary channels.

  FIG. 1 is a schematic diagram of a system structure according to an embodiment of the present invention. The configuration of this system is shown below.

One CAP 11 that determines the current physical frame structure based on the scheduled transmission resource and transmits information indicating the current physical frame structure in the current physical frame;
STA 12 that can communicate with at least one CAP 11 that determines the current physical frame structure based on information indicating the current physical frame structure in the current physical frame.

  Among them, each physical frame length depends on the structure and is a non-fixed value.

  FIG. 2 is a schematic diagram of the structure of the network device according to the embodiment of the present invention. This network device includes an arrangement unit 21 and a first communication unit 22.

  The placement unit 21 determines the current physical frame structure based on the scheduled transmission resource.

  The first communication unit 22 transmits information indicating the current physical frame structure in the current physical frame, and communicates with at least one terminal device.

  Each physical frame length depends on its structure and is a non-fixed value.

  In a preferred embodiment, the placement unit 21 places a synchronization preamble sequence and a system information channel for transmitting information indicating the current physical frame structure in the current physical frame.

  In response, the first communication unit 22 transmits a preamble sequence and transmits information indicating the current physical frame structure on the system information channel.

  In another preferred embodiment, the placement unit 21 places a synchronization preamble sequence and a system information channel of information indicating the current physical frame structure in the current physical frame. Optionally, at least one of the plurality of channels is arranged in the current physical frame.

  The plurality of channels include the following cases.

  1) The plurality of channels include a first downlink transmission channel for transmitting downlink traffic and / or downlink signaling and / or uplink traffic feedback, and a downlink for transmitting a downlink search signal And a search channel and a second downlink transmission channel for transmitting downlink traffic and / or downlink signaling and / or uplink traffic feedback.

  In response to this, the first communication unit 22 transmits a preamble sequence and transmits information indicating the current physical frame structure in the system information channel. Perform related transmission on selectively placed channels.

  In addition, when the arrangement unit 21 determines the current physical frame structure, the allocation and scheduling of transmission resources and the control channel for transmitting information indicating the transmission format of the channel occupying the transmission resources are arranged in the current physical frame. To do. In response, the first communication unit 22 transmits a preamble sequence and transmits information indicating the current physical frame structure in the system information channel. On the control channel, transmission resource allocation and scheduling, and information indicating the transmission format of the channel occupying the transmission resource are transmitted. Perform related transmission on selectively placed channels. Alternatively, the first communication unit 22 transmits a preamble sequence and transmits information indicating a part of the current physical frame structure on the system information channel. Among them, information including at least the length of time of the control channel and indicating the current physical frame structure of other parts is transmitted on the control channel. Information indicating transmission resource allocation and scheduling and the transmission format of the channel occupying the transmission resource is transmitted on the control channel. Perform related transmission on selectively placed channels.

  2) The multiple channels include an uplink search channel for transmitting an uplink search signal, an uplink scheduling request channel for transmitting an uplink scheduling request, uplink traffic, and / or uplink signaling, And / or an uplink transmission channel for transmitting downlink traffic feedback, and / or downlink CQI feedback, and / or downlink CSI feedback, and an uplink random access channel for triggering new user access .

  Alternatively, the plurality of channels includes an uplink search channel for transmitting an uplink search signal, an uplink scheduling request channel for transmitting an uplink scheduling request, uplink traffic, and / or uplink signaling, And / or an uplink transmission channel for transmitting downlink traffic feedback, a CQI feedback channel for transmitting downlink CQI feedback, a CSI feedback channel for transmitting downlink CSI feedback, and new user access And an uplink random access channel for triggering.

  In response to this, the first communication unit 22 transmits a preamble sequence and transmits information indicating the current physical frame structure in the system information channel. Perform related reception on channels that are selectively placed.

  In addition, when the arrangement unit 21 determines the current physical frame structure, the allocation and scheduling of transmission resources and the control channel for transmitting information indicating the transmission format of the channel occupying the transmission resources are arranged in the current physical frame. To do. In response, the first communication unit 22 transmits a preamble sequence and transmits information indicating the current physical frame structure in the system information channel. On the control channel, transmission resource allocation and scheduling, and information indicating the transmission format of the channel occupying the transmission resource are transmitted. Perform related reception on channels that are selectively placed. Alternatively, the first communication unit 22 transmits a preamble sequence and transmits information indicating a part of the current physical frame structure in the system information channel. Among them, information including at least the length of time of the control channel and indicating the current physical frame structure of other parts is transmitted on the control channel. Information indicating transmission resource allocation and scheduling and the transmission format of the channel occupying the transmission resource is transmitted on the control channel. Perform related reception on channels that are selectively placed.

  FIG. 3 is a schematic diagram of the structure of the terminal device according to the embodiment of the present invention. This terminal device includes an analysis unit 31 and a second communication unit 32.

  The analysis unit 31 analyzes information indicating the current physical frame structure in the current physical frame to determine the current physical frame structure.

  The second communication unit 32 communicates with the network device within the current physical frame.

  Among them, each physical frame length depends on its structure and is a non-fixed value.

  In a preferred embodiment, the current physical frame is composed of a preamble sequence and a system information channel having information indicating the current physical frame structure.

  In response to this, the second communication unit 32 receives the preamble sequence and also receives information indicating the current physical frame structure on the system information channel.

  In another preferred embodiment, the current physical frame includes a preamble sequence, a system information channel having information indicating the current physical frame structure, and at least one selectively arranged channel.

  The selectively arranged channels include the following cases.

  1) The selectively arranged channels include an uplink search channel for transmitting an uplink search signal, an uplink scheduling request channel for transmitting an uplink scheduling request, uplink traffic, and / or Uplink transmission channel for transmitting uplink signaling and / or downlink traffic feedback and / or downlink CQI feedback and / or downlink CSI feedback, and uplink random access to trigger new user access Including channels.

  Alternatively, the plurality of channels includes an uplink search channel for transmitting an uplink search signal, an uplink scheduling request channel for transmitting an uplink scheduling request, uplink traffic, and / or uplink signaling, And / or an uplink transmission channel for transmitting downlink traffic feedback, a CQI feedback channel for transmitting downlink CQI feedback, a CSI feedback channel for transmitting downlink CSI feedback, and new user access And an uplink random access channel for triggering.

  Further, the second communication unit 32 receives the preamble sequence and also receives information indicating the current physical frame structure on the system information channel. Performing a related transmission on at least one selectively arranged channel.

  In addition, the current physical frame structure further includes a control channel for transmitting information indicating a transmission format of a channel that occupies and allocates transmission resources and a transmission resource. In response, the second communication unit 32 receives the preamble sequence and receives information indicating the current physical frame structure on the system information channel. The control channel receives information indicating transmission resource allocation and scheduling, and the transmission format of the channel occupying the transmission resource. Performing a related transmission on at least one selectively arranged channel. Alternatively, the second communication unit 32 receives the preamble sequence and receives information indicating a part of the current physical frame structure on the system information channel. Among them, information including at least the length of time of the control channel and indicating the current physical frame structure of the other part is received on the control channel. Information indicating transmission resource allocation and scheduling on the control channel and the transmission format of the channel occupying the transmission resource is received. Performing a related transmission on at least one selectively arranged channel.

  2) The selectively arranged channels are for transmitting downlink traffic and / or downlink signaling and / or a first downlink transmission channel for transmitting uplink traffic feedback and a downlink search signal. And a second downlink transmission channel for transmitting downlink traffic and / or downlink signaling and / or uplink traffic feedback.

  In response to this, the second communication unit 32 receives the preamble sequence and also receives information indicating the current physical frame structure on the system information channel. Perform related reception on at least one selectively arranged channel.

  In addition, the current physical frame structure further includes a control channel for transmitting information indicating a transmission format of a channel that occupies and allocates transmission resources and a transmission resource. In response, the second communication unit 32 receives the preamble sequence and receives information indicating the current physical frame structure on the system information channel. The control channel receives information indicating transmission resource allocation and scheduling, and the transmission format of the channel occupying the transmission resource. Perform related reception on at least one selectively arranged channel. Alternatively, the second communication unit 32 receives the preamble sequence and receives information indicating a part of the current physical frame structure on the system information channel. Among them, information including at least the length of time of the control channel and indicating the current physical frame structure of the other part is received on the control channel. Information indicating transmission resource allocation and scheduling on the control channel and the transmission format of the channel occupying the transmission resource is received. Perform related reception on at least one selectively arranged channel.

  Accordingly, in the embodiment of the present invention, the network device arranges the current physical frame structure based on the scheduled transmission resource, and transmits information indicating the current physical frame structure in the current physical frame. The terminal device can determine the current physical frame structure based on information indicating the current physical frame structure.

  Hereinafter, a case where the network device is CAP and the terminal device is STA will be described as an example.

  In the embodiment of the present invention, the CAP may transmit information indicating the current physical frame structure by the following two methods.

  Method 1: Transmit information indicating the current physical frame structure on the system information channel.

  The information indicating the current physical frame structure includes one or more of information indicating channel presence, information indicating channel presence and time length, and information indicating channel time length.

  The STA associated with the CAP can analyze the information indicating the current physical frame structure in the system information channel to determine the current physical frame structure. The current physical frame length is obtained by adding the length of time of each channel in the current physical frame.

  Preferably, the CAP can transmit the frame length information of the current physical frame on the system information channel. At this time, since the STA related to the CAP can directly determine the frame length of the current physical frame, it is not necessary to calculate.

  Method 2: Transmit information indicating the current physical frame structure on the system information channel and the control channel.

  Information indicating the current physical frame structure is transmitted, and includes one or more of the following types: information indicating channel presence, information indicating channel presence and time, and information indicating channel time.

  The CAP transmits information indicating a part of the current physical frame structure in the system information channel. The information indicating the current physical frame structure of this part includes at least the length of time of the control channel. Information indicating the current physical frame structure of another part is transmitted on the control channel.

  The STA associated with the CAP can analyze the information indicating the current physical frame structure and determine the current physical frame structure. The frame length of the current physical frame is obtained by adding the length of time of each channel in the current physical frame.

  Furthermore, the CAP can transmit the frame length information of the current physical frame to the system information channel. Since the STA associated with the CAP can directly obtain the frame length of the current physical frame, it does not need to be calculated. Alternatively, the CAP can transmit the frame length information of the current physical frame on the system information channel and the control channel. At this time, the STA associated with the CAP obtains the frame length of the current physical frame by adding the frame lengths of the two parts of the system information channel and the control channel.

  In the following, specific examples will be given, and both downlink CQI feedback and downlink CSI feedback will be taken as examples through the uplink transmission channel.

Example 1
FIG. 4 is a structural schematic diagram of a physical frame according to the first embodiment of the present invention. Of these, the abscissa indicates time, and the ordinate indicates frequency or codeword. A physical frame includes a preamble sequence and a system information channel.

  The CAP transmits a preamble sequence and transmits information indicating the current physical frame structure in the system information channel.

  The system information channel according to the first embodiment includes the following fields.

(1) Control channel time length indication field This field indicates the length of time of the control channel. The control channel time length indication field may be 6 bits and indicates a maximum of 63 OFDM symbols. One OFDM symbol is the minimum resource allocation unit. For example, if these 6 bits are 010000, it is 16 when converted to decimal, that is, it corresponds to 16 OFDM symbols.

(2) Downlink transmission channel time length indication field This field indicates the length of time of the downlink transmission channel. The downlink transmission channel time length indication field can be arranged in 9 bits, and indicates a maximum of 511 OFDM symbols. For example, assuming that these 9 bits are 100000000, when converted to a decimal number, it corresponds to 256, that is, 256 OFDM symbols.

(3) Uplink transmission channel time length indication field This field indicates the length of time of the uplink transmission channel. The uplink transmission channel time length indication field can be arranged in 9 bits and indicates a maximum of 511 OFDM symbols.

(4) Downlink exploration channel arrangement field This field indicates the existence of the downlink exploration channel. In the first embodiment, the length of time of the downlink search channel may be fixed, and the downlink search channel arrangement field may be 1 bit. If this bit indicates that there is a downlink search channel, it corresponds to indirectly indicating that this downlink search channel has a fixed length of time.

(5) Uplink exploration channel arrangement field This field indicates the existence and length of time of the uplink exploration channel. The uplink search channel arrangement field may be 2 bits. For example, if 00 is entered, it indicates that there is no uplink exploration channel, if 01 is entered, the uplink exploration channel occupies one OFDM symbol, and if 10 is entered, two uplink exploration channels are present. Indicates that the OFDM symbol is occupied, and entering 11 indicates that the uplink search channel occupies 4 OFDM symbols.

(6) Uplink scheduling request channel allocation field This field indicates the existence of the uplink scheduling request channel and the length of time. The uplink scheduling request channel allocation field may be 2 bits. For example, if 00 is entered, it indicates that there is no uplink scheduling request channel. If 01 is entered, it indicates that the uplink scheduling request channel occupies one OFDM symbol. If 10 is entered, uplink scheduling request channel is indicated. Indicates that 2 OFDM symbols are occupied, and if 11 is entered, it indicates that the uplink scheduling request channel occupies 4 OFDM symbols.

(7) Uplink random access channel allocation field This field indicates the existence of an uplink random access channel. In the first embodiment, the time length of the uplink random access channel may be fixed, and the uplink random access channel arrangement field may be 1 bit. If this bit indicates that an uplink random access channel exists, it corresponds to indirectly indicating that this uplink random access channel is a fixed length of time.

  As a result, the system information channel indicates that the field (1) -represents the channel length information, the fields (4) and (7) indicate the channel existence information, and the fields (5) and (6). ) Indicates information on the existence of the channel and the length of time.

  In the case of other application scenes, the downlink search channel and the uplink random access channel may have a non-fixed time length. At this time, the downlink search channel arrangement field and the uplink random access channel arrangement field may indicate channel existence and time, or channel time information in multiple bits.

  The physical frame structure according to the first embodiment does not include a control channel, a downlink transmission channel, a downlink search channel, an uplink transmission channel, an uplink search channel, an uplink random access channel, and an uplink scheduling request channel. The control channel time length indication field, the downlink transmission channel time length indication field, and the uplink transmission channel time length indication field are filled with time length 0, and the downlink search channel arrangement field and the uplink random access channel arrangement field Is filled with a numerical value indicating that the channel does not exist, the uplink search channel allocation field and the uplink scheduling request allocation field. A number indicating that the channel does not exist is entered in the de.

  In the first embodiment, the length of time of the preamble sequence and the system information channel is set in advance, and both the CAP and the STA know the state of the preset, so that the STA determines the current physical frame structure from the system information channel. , It is determined that the current physical frame includes only the preamble sequence and the system information channel. Therefore, transmission is not performed in the current physical frame, but only related reception is performed.

Example 2
FIG. 5 is a structural schematic diagram of a physical frame according to the second embodiment of the present invention. Of these, the abscissa indicates time, and the ordinate indicates frequency or codeword. The physical frame includes a preamble sequence, a system information channel, a downlink protection interval, an uplink scheduling request channel, and an uplink random access channel.

  The CAP transmits a preamble sequence and transmits information indicating the current physical frame structure in the system information channel.

  Preferably, the information indicating the current physical frame structure is given by the CAP the length of the downlink protection interval time in the second embodiment. At this time, the system information channel may have a protection interval indication field in addition to the field described in the first embodiment. This field may be multi-bit and indicate the length of time of the downlink protection interval, or if the protection interval has a fixed length of time, this field will only indicate the existence of the downlink protection interval with 1 bit. May be shown.

  Preferably, the length of the downlink protection interval described in the second embodiment is given to the broadcast information frame (BCF) of the downlink transmission channel periodic broadcast by the CAP. In BCF, 2 bits indicate the length of time of the downlink protection interval. For example, when the value is 0, the downlink protection interval is 2 OFDM symbols, and when the value is 1, the downlink protection interval is 4 Indicates an OFDM symbol. The STA obtains the length of time of the downlink protection interval by detecting the BCF periodically after the process of accessing the wireless network where the CAP exists and after successful access. At this time, the CAP does not need to indicate the length of the downlink protection interval again for each physical frame, thereby saving the overhead of the system information channel.

  By determining the structure of the current physical frame, the STA can selectively execute the following transmission operation in addition to performing related reception in the current physical frame.

  By transmitting a random access request sequence on the uplink random access channel, the CAP triggers the allocation and transmission of a random access request resource.

  By transmitting an uplink scheduling sequence on the uplink scheduling request channel, the CAP triggers the allocation and transmission of uplink scheduling request resources. Alternatively, fast signaling feedback is transmitted on the uplink scheduling request channel.

  In the second embodiment, the STA acquires transmission resources of the uplink random access channel and the uplink scheduling request channel due to contention. Therefore, the CAP does not need to transmit resource instructions to the two channels on the control channel, and the control channel need not be arranged.

  Preferably, the physical frame structure described in the second embodiment may include only one of the uplink random access request channel and the uplink scheduling request channel.

Example 3
The application scene of the third embodiment is that the CAP has a request for downlink traffic transmission to the STA, the channel search needs to be performed before the downlink traffic transmission, the STA has uplink traffic, uplink signaling or Suppose that there is no request for downlink traffic feedback.

  As a first preferred embodiment, the CAP completes downlink traffic transmission in two physical frames. As shown in FIGS. 6a and 6b, the abscissa indicates time and the ordinate indicates frequency or codeword.

  In the first physical frame, the CAP transmits a preamble sequence, transmits information indicating the current physical frame structure on the system information channel, assigns and schedules transmission resources on the control channel, and transmits transmission resources. Transmitting information indicating the transmission format of the occupied channel and transmitting a downlink search signal on the downlink search channel. The STA determines the structure of the first physical frame through the information indicating the current physical frame structure, and thereby can determine that the following transmission operation is performed on the first physical frame.

  The downlink channel measurement result is fed back from the uplink transmission channel to the CAP. The downlink channel measurement result here is obtained after measuring the downlink channel based on the downlink exploration signal transmitted by the CAP by the STA, and the downlink CQI or downlink CQI and downlink Including CSI. In the second physical frame, the CAP transmits a preamble sequence, transmits information indicating the current physical frame structure on the system information channel, assigns and schedules transmission resources on the control channel, and transmits transmission resources. Transmitting information indicating the transmission format of the occupied channel and transmitting downlink traffic data on the downlink transmission channel.

  The STA determines that the transmission operation is not performed on the second physical frame by determining the structure of the second physical frame based on the information indicating the current physical frame structure.

  As a second preferred embodiment, the CAP completes downlink traffic transmission in two physical frames. As shown in FIGS. 7 and 6b, the abscissa indicates time and the ordinate indicates frequency or codeword.

  In the first physical frame, the CAP transmits a preamble sequence, transmits information indicating the current physical frame structure on the system information channel, assigns and schedules transmission resources on the control channel, and transmits transmission resources. Transmitting information indicating the transmission format of the occupied channel.

  The STA determines the transmission operation as follows in the first physical frame by determining the structure of the first physical frame.

  The STA sends an uplink exploration signal to the CAP on the uplink exploration channel, so that the CAP can measure the uplink channel quality with this uplink exploration signal, or it can measure the uplink channel quality and the uplink channel condition. Do. Based on the principle of uplink and downlink compatibility, obtain CQI of downlink channel, or CQI and CSI of downlink channel.

  In the second physical frame, the CAP transmits a preamble sequence, transmits information indicating the current physical frame structure on the system information channel, assigns and schedules transmission resources on the control channel, and transmits transmission resources. Transmitting information indicating the transmission format of the occupied channel and transmitting downlink traffic data on the downlink transmission channel.

  The STA determines that the transmission operation is not performed on the second physical frame by determining the structure of the second physical frame based on the information indicating the current physical frame structure.

  In the above two embodiments, description will be made from the angle at which the CAP and the STA perform the transmission operation. When the CAP performs a transmission, the STA performs the associated reception. When the STA performs a transmission, the CAP performs the associated reception.

  In the above two embodiments, the CAP indicates the downlink protection interval according to two preferred embodiments similar to the second embodiment. In the case of the first type, the system information channel may include a protection interval indication field in addition to the field described in the first embodiment. This field is a multi-bit length of the downlink protection interval. This field may indicate, or if the protection interval has a fixed length of time, this field may indicate the existence of the downlink protection interval with only one bit. In the case of the second type, the system information channel has the same field as in the embodiment.

  In the above-described two embodiments, if the CAP transmits information indicating the current physical frame structure using the above-described scheme 2, the control channel time length indication field of the system information channel is exemplified using the second physical frame. The corresponding numerical value is entered, and the time length of the downlink transmission channel is indicated by 9 bits in the control channel.

  In the above two embodiments, if the channel search is not performed before transmitting the downlink traffic, the CAP can complete the downlink traffic transmission in one physical frame shown in FIG. 6b.

  In the above two embodiments, the first physical frame and the second physical frame may be continuous or discontinuous.

  Except for the two embodiments described above, channel search may be performed based on the downlink search channel and the uplink search channel before transmitting downlink traffic. That is, a downlink search channel, an uplink search channel, and an uplink transmission channel are simultaneously arranged in the first physical frame. At this time, the CAP measures the uplink channel state using the uplink search signal transmitted from the STA, obtains the downlink CSI based on the uplink-downlink compatibility, and the STA feeds back the downlink on the uplink transmission channel. Receive CQI for the link. Alternatively, the CAP performs uplink channel quality measurements on the uplink exploration signal sent from the STA, obtains the downlink CQI based on uplink downlink compatibility, and the downlink that the STA feedback on the uplink transmission channel Receive CSI.

  In the above two embodiments, the channel search is completed with one physical frame as an example. However, in an actual application, the channel search may be performed using a plurality of physical frames. There is no overlap here.

Example 4
The application scene of the fourth embodiment is that there is a request for uplink traffic transmission in the STA, that channel search must be performed before transmitting the uplink traffic, downlink traffic, downlink signaling or uplink in the CAP. Suppose that there is no traffic feedback request.

  As a first preferred embodiment, if the CAP knows that the STA has a request for uplink traffic transmission, the STA must complete the uplink transmission via two physical frames. As shown in FIGS. 7 and 8, the abscissa indicates time and the ordinate indicates frequency or codeword.

  In the first physical frame, the CAP transmits a preamble sequence, transmits information indicating the current physical frame structure on the system information channel, assigns and schedules transmission resources on the control channel, and transmits transmission resources. Transmitting information indicating the transmission format of the occupied channel.

  The STA determines that the following transmission operation is performed on the first physical frame by determining the structure of the current physical frame.

  By sending an uplink exploration signal to the CAP on the uplink exploration channel, the CAP performs an uplink channel quality measurement on this uplink exploration signal and obtains an uplink CQI, or an uplink channel quality measurement and uplink Uplink CQI and CSI are obtained by performing channel state measurement.

  In the second physical frame, the CAP transmits a preamble sequence, transmits information indicating the current physical frame structure on the system information channel, assigns and schedules transmission resources on the control channel, and transmits transmission resources. Transmitting information indicating the transmission format of the occupied channel.

  The STA determines that the following transmission operation is performed on the second physical frame by determining the structure of the current physical frame.

  Transmit uplink traffic data on the uplink transmission channel.

  As a second preferred embodiment, if the CAP knows that the STA has a request for uplink traffic transmission, the STA must complete the uplink transmission via two physical frames. As shown in FIG. 6a and FIG. 8, the abscissa indicates time and the ordinate indicates frequency or codeword.

  In the first physical frame, the CAP transmits a preamble sequence, transmits information indicating the current physical frame structure on the system information channel, assigns and schedules transmission resources on the control channel, and transmits transmission resources. Transmitting information indicating the transmission format of the occupied channel and transmitting a downlink search signal on the downlink search channel.

  The STA determines that the following transmission operation is performed on the first physical frame by determining the structure of the current physical frame.

  By sending downlink CQI, or downlink CQI and CSI, to the CAP on the uplink transmission channel, the CAP can use the uplink CQI or uplink CQI and CSI based on the principle of uplink compatibility. obtain.

  In the second physical frame, the CAP transmits a preamble sequence, transmits information indicating the current physical frame structure on the system information channel, assigns and schedules transmission resources on the control channel, and transmits transmission resources. Transmitting information indicating the transmission format of the occupied channel.

  The STA determines that the following transmission operation is performed on the second physical frame by determining the structure of the current physical frame.

  Transmit uplink traffic data on the uplink transmission channel.

  In the above two embodiments, from the viewpoint of CAP and STA performing transmission, when CAP performs transmission, STA performs the associated reception. When STA performs transmission, it performs CAP related reception.

  In the above two embodiments, the CAP can schedule the downlink protection interval through two preferred embodiments similar to the second embodiment. Among them, in the first type, the system information channel has a protection interval scheduling field based on the field described in the first embodiment. This field multi-bit is used to schedule the downlink protection interval time. Alternatively, if the protection interval has a fixed time, this field may schedule the existence of the downlink protection interval with only one bit. In the case of the second type, the system information channel may have the same field as in the embodiment. In the above two embodiments, the CAP transmits information indicating the current physical frame structure using the above-described method 2, and the control channel time scheduling field in the system information channel is exemplified using the second physical frame. Fill in the appropriate numbers and schedule the uplink transmission channel time using 9 bits in the control channel.

  In the above two embodiments, if the uplink channel measurement is not performed, the CAP may not arrange the uplink search channel. Uplink traffic transmission is completed with one physical frame shown in FIG.

  In the above two embodiments, the CAP may simultaneously arrange the downlink search channel, the uplink search channel, and the uplink transmission channel in the first physical frame. At this time, the CAP performs uplink channel state measurement through an uplink search signal transmitted on the uplink search channel in the first physical frame of the STA, and obtains the CSI of the uplink. The STA receives the downlink CQI fed back on the uplink transmission channel of the first physical frame and obtains the uplink CQI based on the uplink downlink compatibility, or the CAP receives the first physical frame of the STA. The uplink channel quality is measured through the uplink search signal transmitted on the uplink search channel of the frame to obtain the uplink CQI, or the downlink CSI fed back by the STA on the uplink transmission channel of the first physical frame. Receive and obtain uplink CSI based on uplink downlink compatibility.

  In the above-described two embodiments, a case where channel search is completed with one physical frame will be described as an example. In practical use, channel exploration may be completed through multiple physical frames, so there is no overlap here.

  Examples 1 to 9 above list several possible physical frame structures for the simplest example. The purpose is to explain the relationship between the transmission channel and the corresponding search channel in the physical frame according to the embodiment of the present invention. In the embodiment, it is often more complicated than that. For example, if there are multiple STAs in the system, each CAP and each STA have different transmission requirements, and if it is possible to cope with channel exploration on an STA basis, channel exploration is required before uplink downlink transmission In some cases, channel exploration may not be required prior to transmission on the uplink and downlink. The following examples list physical frame structures that can be deployed for other applications, respectively.

Example 5
FIG. 9 is a structural schematic diagram of a physical frame according to the fifth embodiment of the present invention.

  As shown in FIG. 9, the physical frame includes a downlink subframe and an uplink subframe. The downlink subframe includes a preamble sequence, a system information channel, a control channel, and a downlink transmission channel. An uplink transmission channel is included in the uplink subframe.

  Each STA can share uplink transmission resources through time division, frequency division, code division, space division, or a combination of the above division multiplexing schemes.

  Preferably, the CAP transmits information indicating the current physical frame structure in the system information channel. Here are some examples:

  Schedule the control channel time with 6 bits. These 6 bits can schedule up to 63 OFDM symbols. For example: these 6 bits are 010000, or 16 if converted to decimal, corresponding to 16 OFDM symbols.

  In the system information channel, the downlink transmission channel time is scheduled with 9 bits and a maximum of 511 OFDM symbols. For example: these 9 bits are 100000000, 256 if converted to decimal, corresponding to 256 OFDM symbols.

  In the system information channel, the uplink transmission channel time is scheduled with 9 bits and a maximum of 511 OFDM symbols.

  In the system information channel, the protection interval can be scheduled with only one bit. 1 OFDM symbol in total. Alternatively, the protection interval may not be supported by the system information channel, and the system information channel is arranged in the system. Preferably, the CAP also transmits information indicating the current physical frame structure on the system information channel and the control channel. Here are some examples:

  In the system information channel, the control channel time is transmitted with 6 bits. In the control channel, 9 bits transmit the downlink transmission channel time, and 9 bits transmit the uplink transmission channel time.

  Based on the physical frame structure of FIG. 9, signaling and traffic can be separated during uplink downlink transmission.

Example 6
FIG. 10 is a structural schematic diagram of a physical frame according to Embodiment 10 of the present invention.

  As shown in FIG. 10, a downlink search channel is arranged in the downlink subframe based on FIG. The presence information of the downlink search channel is included in the information indicating the current physical frame structure transmitted by the CAP, and can be realized by 1 bit. What is sent on the system information channel. As shown in FIG. 10, the downlink search channel may be positioned behind the downlink transmission channel.

Example 7
FIG. 11 is a structural schematic diagram of a physical frame according to the seventh embodiment of the present invention. The downlink search channel is located in the middle of the downlink transmission channel.

In the MU-MIMO transmission plan, the downlink MU-MIMO system performance is not only sensitive to the delay of downlink channel state information, but multi-user MIMO has great signal processing complexity. In view of the delay in channel state information and the complexity of each hardware process depending on the embodiment, the downlink search channel is more reasonable if it is in the middle of the downlink transmission channel. If the downlink search channel position is fixed, the presence of the downlink search channel can be scheduled with 1 bit in the system information channel. If there are STAs with different processing capabilities in the system, the location of the downlink search channel can be changed. At this time, it is necessary to schedule not only the presence of the downlink search channel in the system information channel but also the times of the two downlink transmission channels shown in FIG. The two downlink transmission channels can be timed in three ways:
Schedule times for downlink transmission channel 1 and downlink transmission channel 2 respectively.
The total downlink transmission channel time and downlink transmission channel 1 time are scheduled respectively.
The total downlink transmission channel time and downlink transmission channel 2 time are scheduled respectively.

  Through the above-described dynamically or semi-statically arranged downlink search channel positions, sufficient processing time is provided for devices with different processing capabilities.

  Preferably, the CAP may transmit information indicating the current physical frame structure on the system information channel. For example: Schedule control channel time with 6 bits. The total time of the downlink transmission channel is scheduled with 9 bits, and the time of the downlink transmission channel 2 is scheduled with 7 bits. Schedule uplink transmission channel time with 9 bits. Schedule downlink probe channel with 2 bits. No downlink search channel, downlink search channel position 1, downlink search channel position 2 and downlink search channel position 3, which are used for matching the respective sounding bandwidths. The downlink search channel positions 1, 2, and 3 are all defined positions defined by the system.

  Preferably, the CAP may transmit information indicating the current physical frame structure on the system information channel and the control channel. For example, in the system information channel, the control channel time is scheduled with 6 bits for CAP. On the control channel, schedule the downlink transmission channel time with 9 bits, schedule the downlink transmission channel time with 7 bits, schedule the uplink transmission channel time with 9 bits, and downlink search with 2 bits Schedule channel locations.

Example 8
FIG. 12 is a schematic structural diagram of a physical frame according to the eighth embodiment of the present invention.

  In the eighth embodiment, several auxiliary channels may be arranged in the uplink subframe. For example: one or more listed in the uplink search channel, uplink scheduling request channel and uplink random access channel may be placed in the uplink subframe. FIG. 12 shows an example of a frame structure included in three types of auxiliary channels. Actually, auxiliary channels that are not taken into account are also possible depending on the system implementation or method.

  Preferably, the CAP may transmit information indicating the current physical frame structure on the system information channel. For example, in the system information channel, the control channel time is scheduled with 6 bits. Schedule the downlink transmission channel time with 9 bits. Schedule uplink transmission channel time with 9 bits. Schedule the presence and time of the uplink search channel with 2 bits. Schedule 0, 1, 2, 4 OFDM symbols respectively. The presence and time of the uplink scheduling request channel is scheduled with 2 bits, and 1, 2, 3, and 4 OFDM symbols are respectively scheduled. The presence of an uplink random access channel is scheduled with one bit, and the presence or absence of two cases is scheduled. If there is, fix it to 1 OFDM symbol.

Preferably, the CAP may transmit information indicating the current physical frame structure on the system information channel and the control channel. For example:
In the system information channel, the control channel time is scheduled with 6 bits, and the existence of the uplink random access channel is scheduled with 1 bit. In the control channel, the time of the downlink transmission channel is scheduled with 9 bits, the time of the uplink transmission channel is scheduled with 9 bits, and the existence and time of the uplink search channel are scheduled with 2 bits. 2 schedule the existence and time of the uplink scheduling request channel.

Example 9
FIG. 13 is a structural schematic diagram of a physical frame according to the ninth embodiment of the present invention.

  A downlink search channel is arranged in the downlink subframe, and an uplink search channel, an uplink scheduling request channel, and an uplink random access channel are also arranged in the uplink subframe. However, there are actually some assistant channels that are not taken into account, depending on the system implementation or scheme.

  Preferably, the uplink protection interval is through early transmission hold, i.e .: the uplink transmission time is advanced and the protection interval for uplink to downlink conversion is arranged for CAP and STA. Specifically, as shown in FIG. 14, CAP indicates the time of the early scheduled notification for resources transmitted on the control channel at the STA network connection stage. In the subsequent uplink transmission operations, the STA performs early transmission based on this early scheduled time. If the uplink protection interval is reserved early, the downlink protection interval for downlink to uplink transition can be scheduled. Preferably, the sum of the protection times of the maximum downlink to uplink transmission / reception and uplink to downlink transmission / reception of CAP and STA or STA and the corresponding CAP should not be exceeded.

Example 10
FIG. 15 is a schematic diagram of a physical frame structure according to Embodiment 10 of the present invention. Of these, the abscissa indicates time, and the ordinate indicates frequency or codeword.

  For the current physical frame, the CAP performs the following transmissions: sending a preamble sequence, sending information indicating the current physical frame structure on the system information channel, and scheduled transmission on the control channel. Resource allocation and scheduling, and transmission of information indicating the transmission format of the channel on which the transmission resource is scheduled, and one or more described in downlink traffic data, downlink signaling and uplink traffic feedback on downlink transmission channel 1 Scheduling how many, sending downlink exploration signal on downlink exploration channel, downlink transmission channel 2 is downlink traffic data, downlink sign Transmitting one or any number of the described ring and uplink traffic feedback.

The STA determines the structure of the current physical frame, and the current physical frame performs the following transmission:
An uplink search signal is transmitted on the uplink search channel.
An uplink scheduling request is issued on the uplink scheduling request channel.
Transmit uplink traffic and / or uplink signaling and / or uplink feedback on the uplink transmission channel.
Random access is issued on the uplink random access channel.
Preferably, both the uplink protection interval and the downlink protection interval may be scheduled according to a method similar to that of the second embodiment.

  In the above embodiment, when the physical frame includes an uplink transmission channel, an uplink scheduling request channel, and an uplink random access channel, the uplink transmission channel, the uplink scheduling request channel, and the uplink random access channel are time division multiplexed. Then, resources are divided and multiplexed by either frequency division multiplexing, code division multiple access, or a combination method. Taking the physical frame structure according to the tenth embodiment as an example, FIG. 30 shows an example of division multiplexing. Such a division multiplexing system can be arranged in advance and is also known as CAP and STA. At this time, scheduling of the division multiplexing scheme is not required for the physical frame, or scheduling may be performed on the control channel. For example, the uplink scheduling request channel uses 4 bits to schedule the number of subcarriers occupied by the uplink transmission channel, and a maximum of 16 subcarriers are possible. With 4 bits, the number of subcarriers occupied by the row transmission channel in the uplink random access channel is scheduled, and a maximum of 16 subcarriers are possible, which is located at the lower edge of the uplink transmission channel.

  In addition, when a physical frame has a control channel and a system information channel, the control channel and the system information channel can multiplex resources by either time division multiplexing, frequency division multiplexing, code division multiple access, or a combination method. . Taking the physical frame structure according to the tenth embodiment as an example, FIG. 31 shows an example of such division multiplexing, which employs mixed division multiplexing such as frequency division and time division in the system information channel and the control channel. Such a division multiplexing system can be arranged in advance and is also known as CAP and STA. Therefore, scheduling of the division multiplexing scheme is not required for the physical frame. The control channel and the system information channel may be divided and multiplexed only by frequency division.

  Also, transmission resources can be shared among the resources allocated to each STA in the same channel in one or various division multiplexing schemes of time division, frequency division, code division, and space division.

Example 11
Details of the information indicating the current physical frame structure are as follows. Information indicating the existence of the first channel. Information indicating the existence of the first channel is carried in at least one channel of the physical frame.

  Preferably, the first channel is a downlink search channel.

  Based on this, the information indicating the current physical frame structure includes the following: information indicating the time of the second channel. Information indicating the time of the second channel is carried in at least one channel of the physical frame. The second channel can be a downlink transmission channel or an uplink transmission channel.

  In this preferred embodiment, when there is a request for uplink transmission, a downlink channel search is performed first, and then an uplink channel measurement result is obtained based on uplink downlink reciprocity. When there is a request for downlink transmission, the downlink channel search is performed first, and the downlink channel measurement result is directly obtained.

  In another preferred embodiment, the first channel is an uplink random access channel.

Example 12
Details of the information indicating the current physical frame structure are as follows. Information indicating the existence of the first channel. Information indicating the existence of the first channel is carried in at least one channel of the physical frame.

  Preferably, the first channel is a downlink search channel.

  Based on this, the information indicating the current physical frame structure includes the following: information indicating the time of the second channel. Information indicating the time of the second channel is carried in at least one channel of the physical frame. The second channel can be a downlink transmission channel or an uplink transmission channel.

  In this preferred embodiment, when there is a request for uplink transmission, a downlink channel search is performed first, and then an uplink channel measurement result is obtained based on uplink downlink reciprocity. When there is a request for downlink transmission, the downlink channel search is performed first, and the downlink channel measurement result is directly obtained.

  In another preferred embodiment, the first channel is an uplink random access channel.

Example 13
Details of the information indicating the current physical frame structure are as follows. Scheduling channel 1 time information, corresponding time of time or time. The time information of the scheduling first channel is carried in at least one channel of the physical frame.

  In a preferred embodiment of the first type, the first channel is a control channel of the transmission format of the scheduled transmission resource allocation and scheduling, and the transmission resource scheduled channel.

  In a second preferred embodiment, the first channel is a downlink transmission channel.

  Based on this, the information indicating the current physical frame structure includes the following: information indicating the existence and time of the second channel. Information indicating the existence and time of the second channel is carried in at least one channel of the physical frame. The second channel is an uplink search channel used for transmission of uplink search signals.

  In this preferred embodiment, when there is a request for downlink transmission, an uplink channel measurement is performed first, and a downlink channel measurement result is obtained based on uplink downlink compatibility.

  In a third preferred embodiment, the first channel is a downlink transmission channel. Based on this, the information indicating the current physical frame structure includes the following: Information indicating the existence of the second channel. Information indicating the existence of the second channel is carried in at least one channel of the physical frame. The second channel is a downlink search channel used for transmission of a downlink search signal.

  In this preferred embodiment, when there is a request for downlink transmission, a downlink channel measurement is performed first to obtain a downlink channel measurement result.

  In a fourth preferred embodiment, the first channel is an uplink transmission channel.

  Based on this, the information indicating the current physical frame structure includes the following: information indicating the existence and time of the second channel. Information indicating the existence and time of the second channel is carried in at least one channel of the physical frame. The second channel is an uplink search channel used for transmission of uplink search signals.

  In this preferred embodiment, when there is a request for uplink transmission, an uplink channel measurement is performed first to obtain an uplink channel measurement result.

  In a fifth preferred embodiment, the first channel is an uplink transmission channel. Based on this, the information indicating the current physical frame structure includes the following: Information indicating the existence of the second channel. Information indicating the existence of the second channel is carried in at least one channel of the physical frame. The second channel is a downlink search channel used for transmission of a downlink search signal.

  In this preferred embodiment, when there is a request for uplink transmission, a downlink channel measurement is performed first, and an uplink channel measurement result is obtained based on uplink downlink compatibility.

  In the following, the resource scheduling method of the present invention is provided, and after the resource scheduling is realized, the structure of the physical frame can be determined with the scheduling-based transmission resource.

FIG. 18 is a flowchart showing a resource scheduling method according to an embodiment of the present invention, and details of this flow are as follows:
Step S11: Perform resource scheduling based on the transmission requirements.
Step S12: Set a non-fixed physical frame structure of a frame that matches the resource to be scheduled.

  Using the method of the present invention eliminates wasted use of radio resources caused by competing conflicts or random evacuation. Unlike conventional mobile communication systems (including next-generation mobile communication systems such as LTE and WiMax), this system dynamically partitions uplink and downlink radio resources based on business requirements and dynamically Can handle data business requirements with many types and different characteristics.

  In the following, “how to perform resource scheduling and set the physical frame structure according to the transmission demand” will be described in detail.

Example 14
When there is a request for transmission, a transmission resource according to the request for transmission is scheduled, and a structure that can match the scheduled transmission resource is arranged. The transmission request according to the present invention is carried based on the scheduling information, and the CAP analyzes the scheduling information to obtain the transmission request and complete the resource scheduling.

Among them, the request for uplink transmission is obtained by CAP from STA. Specifically, the CAP takes the uplink transmission request in three ways:
First: Take a request-response method to get a request for uplink transmission. Specifically, the STA transmits a scheduling request. The CAP allocates the transmission request resource for feedback of the uplink to the STA, and the STA feeds back the uplink transmission request with the appropriate resource.

  When the first method is taken, it is necessary to arrange an uplink scheduling request channel in the frame structure. It is used to request an uplink transmission request from the STA to the CAP, thereby requesting a resource for transmitting a request for uplink transmission to the CAP.

  When the uplink scheduling request channel is arranged in the frame structure, exclusive uplink transmission resource scheduling can be performed for the STA, and the STA is used for transmission of the uplink scheduling due to non-contention. It is possible to schedule sharable uplink transmission resources for STAs. STA is used to transmit uplink scheduling request due to contention. That is, the STA sends a scheduling request and can use an uplink transmission request system without contention collision or a contention based uplink transmission request system.

  When the uplink scheduling request channel is allocated, the time of the uplink scheduling request channel is allocated based on the number of STAs related to the CAP. For example, N uplink scheduling request channels can be allocated for each NSTA related to the CAP. Each STA can transmit an uplink scheduling request based on an uplink transmission request system without a contention collision on a corresponding channel. Can be allocated for NSTA related to CAP or for M uplink scheduling request channel. M is smaller than N, and N STAs contend for M uplink scheduling channels and send an uplink scheduling request.

  In addition, by designing an uplink scheduling request channel, it is possible to perform fast feedback using feedback of switching amount information.

  Second: Take polling and get a request for uplink transmission. Specifically, the CAP receives a feedback uplink transmission request from the STA by performing periodic polling to each STA.

  Third: Take a mobile reporting method and get a request for uplink transmission. Specifically, when transmitting uplink traffic, the STA carries an uplink transmission request in a data frame and transmits it to the CAP according to the uplink traffic.

  Among them, the request for downlink transmission is obtained from the MAC layer or higher layer of the CAP.

  The transmission request is divided into an uplink transmission request and a downlink transmission request depending on the transmission direction. When there is a request for uplink transmission, an uplink that can be matched with the scheduled uplink resource is arranged by scheduling the uplink resource according to the request for uplink transmission. If there is a request for downlink transmission, the downlink resource can be scheduled according to the request for downlink transmission and a downlink transmission channel that can be matched with the scheduled downlink resource can be arranged.

  The transmission request is a request for transmission of traffic data or a request for channel transmission, depending on the type of transmission data. And divided into request feedback.

  Based on this, there are the following cases of uplink transmission channels that can schedule uplink transmission resources and match the former in response to a request for uplink transmission.

  When there is a request for uplink traffic transmission, an uplink traffic transmission channel is arranged in the frame structure to enable scheduling of uplink transmission resources in the uplink traffic. The time of the uplink traffic channel is determined by the total transmission resources required to transmit the uplink traffic of each STA associated with the CAP.

  When there is a request to transmit uplink signaling, uplink transmission resources for uplink signaling are scheduled, and an uplink signaling channel is arranged in the frame structure. The time of the uplink signaling channel is determined by the total transmission resources required for transmission of uplink signaling of each STA related to the CAP.

  When there is a request to feed back downlink traffic, scheduling of downlink transmission resources is fed back for downlink traffic, and a downlink traffic feedback channel is arranged based on this arrangement. The downlink traffic feedback channel time is determined by the total transmission resources required for downlink traffic feedback from the CAP to each associated STA.

  If there are other uplink transmission requirements, the corresponding signaling is increased on the uplink transmission channel. There is no overlap in the present invention.

Based on this, downlink transmission channels that can schedule downlink transmission resources and match the former in response to downlink transmission requirements include the following cases:
When there is a request for transmission of downlink traffic, downlink transmission resources are scheduled for downlink traffic, and a downlink traffic transmission channel is arranged in the frame structure. The time of the downlink traffic transmission channel is determined by the total transmission resources required for transmission of downlink traffic to each STA associated with the CAP.

  When there is a request for downlink signaling transmission, downlink transmission resources are scheduled for downlink signaling, and a downlink signaling channel is arranged in a frame structure. The time of the downlink signaling channel is determined by the total transmission resources required for downlink signaling for each STA transmission associated with the CAP.

  When there is a request for feedback on uplink traffic, scheduling of downlink resources is fed back to uplink traffic, and an uplink traffic feedback channel is arranged. The time of the uplink traffic channel is determined by the total transmission resources required for uplink traffic feedback from the CAP to each associated STA.

  If another downlink transmission is required, the corresponding signaling is increased on the downlink transmission channel. There is no overlap in the present invention.

  Preferably, when scheduling transmission resources, channel conditions must be taken into account, making resource scheduling more rational. Resources can be allocated according to the channel quality information CQI. Alternatively, resources can be allocated by CQI and channel state information CSI. Among them, CSI is an H matrix (N × M hierarchy, N receive antennas, M transmit antennas) of transmission channels, or an H matrix of transmission channels is a V matrix (M × K hierarchy) after SVD decomposition. ) Or compression information of this V matrix. CQI includes any one or several of the following information. Transmission channel SNR or SINR, MCS (Modulation code set applicable for downlink transmission), NSS (Number of spatial streams applicable for downlink transmission), PMI (Applicable for downlink transmission) Aggregation of pre-coating matrix) and other related measures.

  STA capability is that when CAP gets CQI, CAP gets CQI and schedules resources based on transmission request and CQI. STA capability is that when CAP gets CQI and CSI, CAP gets CQI and CSI and schedules resources based on transmission request, CQI and CSI.

  Among them, CQI is CQI obtained by measurement of all frequency bands or CQI obtained by measurement of some frequency bands. CSI is CSI obtained by measurement of all frequency bands or CSI obtained by measurement of some frequency bands.

In the following, the resource scheduling and frame structure arrangement of the present invention will be described separately for the acquisition of uplink channel status and downlink channel status, respectively:
When scheduling the uplink transmission resource, the resource is scheduled by the uplink CQI. To get an uplink CQI, the following design proposals can be taken:
Method 1: Estimate based on uplink search channel. That is, when there is a request to schedule uplink transmission resources, for example, when there is a request to transmit uplink traffic, a request to transmit uplink signaling, or a request to feed back downlink traffic, an uplink CQI is obtained. Thus, resource scheduling must be performed, and uplink search channels are arranged in the frame structure. Used to transmit uplink search signals from STA to CAP. When the CAP schedules uplink transmission resources, it measures uplink search signals via uplink search channels, calculates uplink channel quality information CQI, and allocates resources based on the calculated uplink CQI. Schedule.

  Method 2: Schedule uplink downlink compatibility of TDD system, STA estimate and feed back downlink CQI. CAP obtains uplink CQI based on system compatibility. In other words, when there is a request for uplink transmission, resource scheduling must be performed to obtain uplink CQI, downlink search channel and CQI feedback channel are arranged in the frame structure, Used to send exploration signals from CAP to STA. The CQI feedback channel is used for downlink CQI feedback calculated based on the downlink search signal from the STA to the CAP. In response to the request for uplink transmission, the CAP obtains the uplink CQI by the downlink CQI fed back from the STA based on the uplink downlink compatibility when scheduling the uplink transmission resource, and the uplink CQI To schedule uplink transmission resources.

  When scheduling uplink transmission resources, the resources are scheduled by uplink CQI. To obtain uplink CQI and uplink CSI, the following design proposals can be taken.

  Method 1: Estimate based on uplink search channel. That is, if there is a request to schedule uplink transmission resources, for example, a request to transmit uplink traffic, a request to transmit uplink signaling, or a request to feed back downlink traffic, an uplink CQI and uplink Since it is necessary to schedule resources to obtain the CSI of the link, an uplink search channel for transmitting an uplink search signal from the STA to the CAP is arranged in the frame structure. When scheduling uplink transmission resources, uplink uplink channel quality information CQI and CSI are calculated by measuring uplink search signals in the uplink search channel, and the calculated uplink CQI and uplink are calculated. Scheduling resources to match your CSI.

  Method 2: Using the uplink / downlink compatibility of the TDD system, the STA estimates and feeds back the downlink CQI and downlink CSI. The CAP obtains the corresponding uplink CQI and uplink CSI based on system compatibility. That is, when there is a request for uplink transmission, it is necessary to schedule resources so as to obtain uplink CQI and uplink CSI, so the downlink for transmitting a downlink search signal from CAP to STA Search channel, CQI feedback channel for feedback of downlink CQI estimated from downlink search signal from STA to CAP, and CSI of downlink estimated from downlink search signal from STA to CAP The CSI feedback channel for feeding back the signal is arranged in the frame structure. When scheduling uplink transmission resources according to the uplink transmission request, the uplink CQI is determined by the downlink CQI fed back from the STA based on the uplink compatibility, and the downlink fed back from the STA. The uplink CSI is determined by the CSI of the link, and uplink transmission resources are scheduled according to the uplink CQI and the uplink CSI.

  Method 3: Take a direct measurement method to obtain CQI, schedule system compatibility and obtain CSI. Or take a direct measurement method to get CSI, schedule system compatibility and get CQI.

  In other words, when there is a request for uplink transmission, resource scheduling must be performed to obtain uplink CQI and uplink CSI, and uplink search channel, downlink search channel and CQI feedback channel are arranged in the frame structure To do. The uplink search channel is used to transmit uplink search signals from the site STA to the center access point CAP. A downlink search channel is used to transmit search signals from the CAP to the STA. The CQI feedback channel feeds back the measured uplink downlink CQI of the exploration signal from the STA to the CAP via the downlink. In response to the request for uplink transmission, when scheduling uplink transmission resources, the uplink search signal is measured on the uplink search channel, and from the STA based on the uplink channel quality information CSI and uplink downlink compatibility The uplink CQI is acquired based on the fed back downlink CQI, and uplink transmission resources are scheduled based on the uplink CQI and the uplink CSI.

  Alternatively, when there is a request for uplink transmission, it is necessary to schedule resources so that uplink CQI and uplink CSI are obtained, so that an uplink search signal is transmitted from the site STA to the center access point CAP. Uplink search channel, downlink search channel for transmitting downlink search signal from CAP to STA, and CSI feedback channel for feedback of downlink CSI estimated by downlink search signal from STA to CAP Are arranged in a frame structure. When the CAP schedules uplink transmission resources according to uplink transmission requirements, it measures uplink search signals on the uplink search channel, calculates uplink channel quality information CQI, and uplink downlink compatibility. Then, uplink transmission resources are scheduled according to the uplink CQI and the uplink CSI according to the downlink CSI fed back from the STA.

When scheduling downlink transmission resources, resources are scheduled by downlink CQI. To get the downlink CQI, the following design proposals can be taken:
Method 1: TDD system uplink downlink compatibility can be scheduled. CAP estimates downlink CQI. Specifically, when there is a request for scheduling downlink transmission resources, for example, when there is a request for transmission of downlink traffic, a request for transmission of downlink signaling, or a request for feedback on uplink traffic, the downlink Resource scheduling must be performed to obtain CQI, and uplink search channels are arranged in the frame structure. Used to transmit uplink search signals from STA to CAP. When the CAP schedules downlink transmission resources, it measures the uplink exploration signal via the uplink exploration channel, calculates the uplink CQI, and determines the downlink CQI based on the uplink downlink compatibility of the TDD system. And schedule downlink CQI resources.

  Method 2: STA can measure downlink CQI. By taking a feedback method and reporting the measurement results to the CAP, the CAP gets the downlink CQI. Specifically, when there is a request for scheduling downlink transmission resources, for example, when there is a request for transmission of downlink traffic, a request for transmission of downlink signaling, or a request for feedback on uplink traffic, the downlink Resource scheduling must be performed to obtain CQI, and a downlink search channel and a CQI feedback channel are arranged in the frame structure, and the downlink search channel is used to transmit a search signal from the CAP to the STA. The CQI feedback channel is used for downlink CQI feedback calculated based on the downlink search signal from the STA to the CAP. When scheduling downlink transmission resources, the resources are scheduled according to the downlink CQI fed back from the STA.

  Among them, the time of the uplink search channel is determined by the total number of antennas of the reported uplink search signal STA.

  When scheduling uplink transmission resources, the resources are scheduled according to uplink CQI and CSI. To obtain uplink CQI and CSI, the following design proposals can be taken.

  Method 1: Using the uplink / downlink compatibility of the TDD system, the CAP estimates the downlink CQI and CSI. Specifically, when there is a request to schedule uplink transmission resources, for example, when there is a request to transmit uplink traffic, a request to transmit uplink signaling, or a request to feed back uplink traffic, Since it is necessary to perform resource scheduling to obtain CQI and downlink CSI, an uplink search channel for transmitting an uplink search signal from the STA to the CAP is arranged in the frame structure. When scheduling downlink transmission resources, uplink CQI and uplink CSI are calculated by measuring uplink search signal in the uplink search channel, and based on uplink downlink compatibility of TDD system The downlink CQI and the downlink CSI are determined, and resources are scheduled according to the downlink CQI and the downlink CSI.

  Method 2: The STA obtains the downlink CQI and the downlink CSI by measuring the downlink CQI and the downlink CSI and reporting the measurement result to the CAP by feedback. Specifically, when there is a request to schedule downlink transmission resources, for example, when there is a request to transmit downlink traffic, a request to transmit downlink signaling, or a request to feed back uplink traffic, Since it is necessary to schedule resources to obtain CQI and CSI for downlink, it is based on downlink probe channel for transmitting downlink probe signal from CAP to STA, and downlink probe signal from STA to CAP A CQI feedback channel for feeding back the estimated downlink CQI and a CSI feedback channel for feeding back the downlink CSI estimated based on the downlink search signal from the STA to the CAP are arranged in the frame structure.When scheduling downlink transmission resources, resources are scheduled based on downlink CQI and downlink CSI fed back by STA.

  Preferably, after receiving the STA feedback CQI, the quality of the channel corresponding to the STA can be calculated by taking a resource allocation method. For example, when the resource allocation method is time division or frequency division, resource scheduling can be performed using downlink CQI and CSI directly fed back from the STA. In the case of space division, the resource allocation method calculates the transmission interference of the corresponding space division of each STA by the CSI fed back from each STA, and when using the CQI of feedback from each STA, eliminates the corresponding space division interference Must. Further, CQI processing of feedback from each STA can be performed by other adjustment factors. Resource scheduling CQI is obtained.

  Method 3: Considering that the amount of CQI data is small and the amount of CSI data is large, the channel estimation accuracy of STA is downlink is higher than the channel estimation accuracy based on TDD system compatibility. Based on this, CAP will make use of TDD system uplink downlink compatibility to estimate downlink CSI and save communication capacity. The STA measures the downlink CQI, takes a feedback method, and reports the measurement result to the CAP so that the CAP can obtain the correct CQI. Specifically, when there is a request to schedule downlink transmission resources, for example, when there is a request for transmission of downlink traffic, a request for transmission of downlink signaling, or a request to feed back to uplink traffic, Resource scheduling should be performed to obtain link CQI and downlink CSI, and uplink search channel, downlink search channel and CQI feedback channel are arranged in the frame structure. The uplink search channel is used to transmit uplink search signals from the STA to the CAP. The downlink search channel is used to send search signals from the CAP to the STA. The CQI feedback channel is used for downlink CQI feedback measured from STA to CAP based on downlink probing signal. When scheduling a downlink transmission resource, scheduling a resource by scheduling one or more of a request for transmitting downlink traffic, a request for transmitting downlink signaling, and a request for feedback to uplink traffic Measure uplink search channel, uplink search signal, calculate uplink CSI, obtain downlink CSI based on system uplink downlink compatibility, and from downlink CSI and STA The resource is scheduled by the downlink CQI fed back.

  Preferably, after receiving the feedback CQI from the STA, the resource allocation method can be taken to calculate the quality of the channel corresponding to the STA. For example, when the resource allocation method is time division or frequency division, resource scheduling can be performed using downlink CQI and CSI directly fed back from the STA. In the case of space division, the resource allocation method calculates the transmission interference of the corresponding space division of each STA by the CSI fed back from each STA, and when using the CQI of feedback from each STA, eliminates the corresponding space division interference Must. Further, CQI processing of feedback from each STA can be performed by other adjustment factors. CQI for resource scheduling is obtained.

  Preferably, resources can be scheduled for access to the STA's CAP if access to the other STA's CAP is allowed. A random access channel is arranged in the frame structure, and is used for STA CAP access to establish a relationship with the CAP. The time of the random access channel is determined by the maximum number of expected simultaneous access STAs. If access to the CAP of other STAs is not permitted, the current frame cannot access the channel in the current arrangement at random.

  Among them, STA can be adopted in two ways and can be used for uplink search signal transmission in uplink search channel: CAP is triggered to schedule to send STA search signal. Alternatively, after the CAP schedules once, the STA periodically transmits a search signal through the uplink search channel in a short time.

  Among them, when arranging the CQI feedback channel and / or CSI feedback channel, the CQI feedback channel and / or CSI feedback channel may be arranged in the uplink transmission channel. Soon the CQI feedback channel / or CSI feedback channel may be part of the uplink transmission channel. Further, the CQI feedback channel and / or the CSI feedback channel may be a channel different from the uplink transmission channel.

  Preferably, control channels can be arranged in the frame structure. Information on one or more of the uplink transmission channel, downlink search channel, uplink search channel, downlink search channel, CQI feedback channel, CSI feedback channel, uplink scheduling request channel, random access channel It is used for carrying. This informs the specific resource allocation status of each channel in the CAP related STA frame structure.

  Among them, the control channel is composed of scheduling signaling, and description information is carried in the scheduling signaling. Scheduling signaling is used to indicate a resource scheduling target and a transmission resource to be scheduled for the target. The target is one or a set of site STAs.

  The time of the control channel is determined by the total transmission resources required for distribution of scheduling signaling to each STA associated with the CAP. The control channel period is obtained by calculating and summing the size of each channel signaling. Alternatively, if the signaling size is a fixed value, the period of the control channel is obtained by multiplying the fixed length of signaling and the number of downlink scheduling signaling.

  When scheduling resources, for example, a maximum carrier ratio scheduling algorithm, a polling scheduling algorithm, a direct proportional fair scheduling algorithm, or the like may be employed. The type of the scheduled resource schedules one or many combinations among time division, frequency division, code division and space division. Therefore, in the frame structure, each channel schedules one or various combinations among time division, frequency division, code division, and space division.

  In the following, detailed examples of the frame structure of how to perform resource scheduling in response to a request will be described with reference to 1 to 5 application examples.

Application example 1
This application example measures the downlink channel quality status in the uplink exploration channel based on the system's uplink downlink compatibility, finishes the downlink scheduling and transmission process, details as shown in Figure 5 Including the following steps:
Step S501: The CAP receives and analyzes the downlink scheduling information, and then obtains a request for transmitting downlink traffic to the STA1 and STA2.

  The request for transmitting downlink traffic includes a scheduling request for each STA or various traffic streams of each STA. For example: unscheduled traffic and platoon size, quality of service QoS requirements for each traffic, traffic priority, etc. The request to transmit downlink traffic is carried based on downlink scheduling information.

  Procedure S502: CAP schedules two uplink search channels for STAs that need scheduling, that is, STA1 and STA2.

  Procedure S503: CAP is an uplink exploration signal that STA1 and STA2 respectively transmit on the uplink exploration channel. Based on the uplink downlink compatibility of the TDD system, the CAP1 determines the quality of the downlink transmission channel supported by STA1 and STA2. obtain.

  Step S504: The CAP schedules downlink transmission resources corresponding to the STA1 and STA2, respectively, based on the downlink scheduling information and the quality of the downlink transmission channel.

  Among them, STA1 and STA2 share a downlink transmission resource using a time division multiplexing method.

  Step S505: The CAP schedules a transmission resource for feedback to downlink traffic for the STA1 based on the downlink scheduling information and the quality of the downlink transmission channel.

  STA2 does not feed back ACK2 from the uplink transmission of the Nth frame in the downlink transmission. This possibility is due to the following: (1) STA2 is in N + k feedback for the downlink transmission of the Nth frame. (2) STA2 downlink traffic does not need to be fed back to ACK.

  The CAP arranges the matching structure of the scheduled transmission resources, and the STA knows the channel structure via the analysis system information channel, and knows the specific transmission resource allocation status via the analysis control channel.

  To clearly explain the resource scheduling process of this application example, as shown in FIG. 20, the scheduling process of the resource for downlink traffic transmission through two frames, and the frame structure is dynamically scheduled by the scheduled resource. Terminate the process.

Application example 2
This application example provides channel quality measurement information fed back from the STA to the CAP, and the CAP terminates the uplink scheduling and transmission process based on the feedback channel quality information. Specifically, as shown in FIG. 21, the following procedure is included:
Step S701: The CAP receives and analyzes downlink scheduling information, and obtains a request to transmit downlink traffic to STA1 and STA2.

  The request for transmitting downlink traffic includes a scheduling request for each STA or various traffic streams of each STA. For example: unscheduled traffic and platoon size, quality of service QoS requirements for each traffic, traffic priority, etc. The request to transmit downlink traffic is carried based on downlink scheduling information.

  Step S702: The CAP schedules two CQI feedback channels for two STAs that require scheduling, that is, for STA1 and STA2.

  Step S703: The CAP is used to transmit a search signal on the downlink search channel.

  Step S704: Each of STA1 and STA2 measures the search signal in the downlink search channel of CAP, and obtains the quality of the downlink search channel corresponding to STA1 and STA2.

  Step S705: STA1 and STA2 feed back the calculated quality of the downlink search channel to the CAP through the corresponding CQI feedback channel.

  Step S706: The CAP schedules downlink transmission resources for STA1 and STA2, respectively, based on the downlink scheduling information and the quality of the downlink transmission channel.

  Step S707: The CAP schedules transmission resources for feedback to downlink traffic for the STA1 based on the downlink scheduling information and the quality of the downlink transmission channel.

  The STA2 does not feed back the downlink transmission ACK2 in this frame in the downlink transmission of the Nth frame for the following reasons: (1) STA2 feeds back the N + kth feedback in the downlink transmission of the Nth frame. To transmit. (2) ACK signaling feedback is not required for STA2 downlink traffic.

  The CAP arranges a frame structure that can be matched with the transmission resource, and the STA grasps the channel structure through the analysis system information channel, and knows a specific transmission resource allocation state through the analysis control channel.

  In this application example, in order to clearly explain the resource scheduling process, as shown in FIG. 22, a resource transmission resource scheduling process through two frames and a process of dynamically allocating a frame structure according to the scheduled resource Exit.

  Application example 1 requires an uplink search channel based on the quality of the downlink transmission channel obtained based on the TDD uplink downlink channel compatibility. In Application Example 2, since the STA measures the downlink search channel and feeds back the channel quality to the CAP, the uplink search channel becomes unnecessary.

  Regardless of the feedback method, the CAP scheduler is determined based on STA capability and system location. Since the channels arranged in the frame structure can meet the transmission requirements, preferably the radio channel time can be selectively adjusted.

Application example 3
In this application example, an uplink scheduling and transmission process is provided. As shown in FIG. 23, the following procedure is included:
Step S901: The CAP receives an uplink scheduling request signal transmitted from the STA on the uplink scheduling request channel of the N-2th frame.

  Procedure S902: The CAP schedules an uplink search channel and an uplink transmission channel used for transmitting a request for uplink traffic transmission for the STA in the N-1th frame.

  Step S903: The CAP receives and analyzes uplink scheduling information on the uplink transmission channel of the N-1th frame, and obtains a request for transmitting uplink traffic from the STA.

  The request for uplink traffic transmission includes a scheduling request for STA or various traffic streams of STA. For example: unscheduled traffic and platoon size, quality of service QoS requirements for each traffic, traffic priority, etc. The request to transmit uplink traffic is carried based on uplink scheduling information.

  Step S904: The CAP measures the uplink search signal transmitted from the STA on the uplink search channel of the N-1th frame, and obtains the quality of the uplink transmission channel corresponding to the STA.

  Step S905: The CAP schedules uplink transmission resources for the STA in the Nth frame based on the uplink traffic transmission request by the STA and the uplink transmission channel.

  The CAP arranges a frame structure that can be matched with the transmission resource, and the STA grasps the channel structure through the analysis system information channel and knows a specific transmission resource allocation state through the analysis control channel.

  In this application example, in order to clearly explain the resource scheduling process, as shown in FIG. 24, the uplink traffic transmission resource scheduling process through three frames, and the frame structure is dynamically changed by the scheduled resource. End the process to be deployed.

Application example 4
This application example provides another uplink scheduling and transmission process. As shown in FIG. 25, the following procedure is included:
Procedure S1101: CAP schedules uplink transmission resources for STA in the Nth frame.

  Step S1102: When the STA performs uplink transmission, the STA carries a request for transmitting uplink traffic in a data frame, and transmits it to the CAP together with the uplink data.

  Step S1103: After receiving the request for uplink traffic transmission from the STA, the CAP allocates uplink transmission resources for the STA in the (N + 1) th frame based on the uplink traffic transmission request transmitted by the STA .

  The CAP arranges a frame structure that can be matched with the transmission resource, and the STA grasps the channel structure through the analysis system information channel and knows a specific transmission resource allocation state through the analysis control channel.

  In this application example, in order to clearly explain the resource scheduling process, as shown in FIG. 26, the resource scheduling process that completes traffic transmission in two uplinks, and the frame structure is dynamically changed by the scheduled resource. End the process to be deployed.

Application example 5
FIG. 27 is a diagram illustrating a system structure of an uplink / downlink scheduling process according to this application example.

  As shown in FIG. 27, a frame includes a preamble sequence, a system information channel, a control channel, a downlink traffic transmission channel, a downlink protection interval DGI, an uplink search channel, an uplink scheduling request channel, an uplink traffic transmission channel, Includes uplink random access channel and uplink protection interval UGI.

  Among them, the preamble sequence specifically includes a short pilot and a long pilot.

  Related to 関 連 CAP are four STAs, namely STA0, STA1, STA2 and STA3.

  In the N-1th frame, STA0 performs uplink downlink traffic transmission, but there is still a grouping array in the downlink transmission train of each STA0 traffic and is waiting for scheduling. After uplink traffic is transmitted, after STA0 finishes with N-1 frames up, the uplink train of each traffic of STA0 waits for the group quantity. In the Nth frame, the CAP ensures that it is called efficiently, and the CAP schedules the quality of the downlink channel in which STA0 is fed back on the uplink transmission channel in the N-1th frame. In order to ensure high efficiency and uplink scheduling in the Nth frame, the CAP uses the N-1th frame scheduling STA0 to transmit an uplink search signal on the uplink search channel 1 and is used to measure uplink channel quality. . In the N-1 frame, STA1 is waiting for scheduling because new frame traffic has arrived. STA2 completes the random process in the N-1 frame, waits for scheduling, and reports the transmission capability and device configuration of STA2 to CAP. The STA 3 transmits an uplink scheduling request on the uplink channel of the N-1 frame.

  In the Nth frame, the downlink transmission process, CAP for STA0 based on STA0's downlink configuration information and based on the quality of the downlink exploration channel fed back from N-1 frame 384 OFDM symbols are scheduled and used for downlink traffic transmission. Since only STA0 has traffic transmission, the downlink transmission channel allocates a total of 384 OFDM symbols in this frame, and all of the OFDM symbols with code 1 to code 384 transmit downlink traffic from CAP to STA0. Downlink. In order for the CAP to schedule the downlink STA1 in the subsequent frame, the CAP sends a downlink search signal and schedules channel state information fed back in the uplink transmission process of the STA1. Therefore, in this frame, 1 OFDM symbol is arranged in the downlink search channel.

  In the Nth frame, in the uplink transmission process, the CAP uplinks for STA0 based on the uplink channel information fed back from STA0, based on the quality of the uplink channel measured in uplink search channel 1 Schedule uplink 128 OFDM symbols used for traffic transmission. The CAP allocates 16 OFDM symbols for STA2, and reports the STA2 transmission capability and equipment configuration. The CAP allocates 16 OFDM symbols for STA3 and reports the uplink scheduling channel. Both STA2 and STA3 are feedback transmissions and take a specific modulation code format. CAP does not need to consider uplink transmission channel quality. After the transmission is finished, STA0 does not need downlink transmission traffic transmission, so STA0 does not need feedback of downlink channel quality. However, because CAP estimates that there is untransmitted uplink traffic at STA0, scheduling STA0 transmits an uplink search channel via uplink search channel 1. At the same time, the CAP schedules STA 3 and places an uplink search channel in uplink search channel 2. Simplify STA3 uplink transmission with N + 1 frames. CAP also allocates 64 OFDM symbols for STA1 and feeds back uplink channel quality. In short, the uplink search channel requires a total of 128 + 16 + 16 + 64 = 224 OFDM symbols. Among them, the codes 1 to 16 are used for reporting the device capability by the STA2. Codes 17 to 32 are used to feed back uplink scheduling information from STA3. Code 33 to code 96 are used for feedback of downlink channel quality from STA1. Code 98 to code 224 are used for uplink transmission from STA0. This frame also requires two uplink search channels. Since it is not known whether other STAs send uplink traffic scheduling requests, 2 OFDM symbols are reserved and used for the uplink scheduling request channel. Since it is not known whether there is a new random access, one OFDM symbol is used for uplink random access.

  CAP control channel calculation request: ACK / NACK is fed back for downlink scheduling transmission and STA0 uplink of N-1 frame, and two control subchannels are required. Uplink scheduling transmission requires six control subchannels, which are used for STA0, STA1, STA2 and STA3 uplink transmission channel scheduling, and STA0 and STA3 uplink search channels, respectively. In short, this frame uses six OFDM symbols for control channel transmission.

  Based on the above scheduling considerations, the structure information of the Nth frame is as follows. 6 OFDM symbols are used for control channel transmission, 384 OFDM symbols are used for downlink traffic transmission, and one OFDM symbol is transmitted for the downlink search channel (downlink search channel address is a fixed value). 2 OFDM symbols are used for uplink search channel transmission, 2 OFDM symbols are used for uplink scheduling request channel, 224 OFDM symbols are used for uplink transmission channel, 1 OFDM symbol is up Used for link random access channels. In addition to this, a system-specific short pilot and long pilot are added, and there is one OFDM symbol in the system information channel. The downlink to uplink protection interval DGI and the uplink to downlink protection interval UGI each have one OFDM symbol. Total: 3 + 6 + 384 + 1 + 1 + 1 + 2 + 2 + 224 + 1 + 1 = 625 OFDM symbols.

  Based on the above process, STA0, STA1, STA2, and STA3 receive the communication frame, and then detect the broadcast information of the system information channel, so that the 6 OFDM symbols of the control channel period, the downlink transmission channel period 384 OFDM symbols, 1 OFDM symbol with DGI period, 1 OFDM symbol with downlink search channel period, 2 OFDM symbol with uplink channel period, 2 OFDM symbol with scheduling request channel period, 224 OFDM symbol with uplink transmission channel period, random access channel One OFDM symbol with a period and one OFDM symbol with a UGI period can be acquired. Then, for the preamble sequence, 2 OFDM symbols of channel period (1 OFDM symbol of short training sequence, 1 OFDM symbol of long training sequence), 1 OFDM symbol of system information channel period, control channel period, downlink transmission channel period, downlink search channel Calculate the sum of the period, DGI period, uplink search channel period, scheduling request channel period, uplink transmission period, random access channel period, UGI period, and calculate the N frame length, that is 3 + 6 + 384 + 1 + 1 + 2 + 2 + 2 + 224 + 1 + 1 = 625 OFDM symbols.

  The embodiment of the present invention provides a method for indicating the allocation status of each channel resource in a physical frame structure. Details are as follows.

1. System information channel and control channel:
System information channel field definition The system information channel uses MCS0 transmission rather than space-time coding. Table 1 shows the system information field definitions.

  Among them, the system information channel is a 16-digit CRC verify, and the CRC generator polynomial is

. The initial state of the register is 0xFF, and after completion of the operation, the register state is output in the reverse CRC verify sequence. High hierarchy register output is high

In addition, the low-level register output is low

Corresponding to

2. Definition of control channel field:
The control channel employs MCS1 transmission rather than space-time coding. The control channel is composed of multiple unicasts and cast signaling. The uplink and downlink unicast signaling fields are shown in Table 2.

  Of which

Is the XOR of the CRC verification code in the unicast signaling field and the only 12-bit ID in this zone for CAP assignment.

  Using the 16-digit CRC verify on the control channel, the CRC generator polynomial is

The definition is the same as in Table 1.

3. Uplink downlink transmission channel:
Uplink downlink transmission channel resource allocation type:
This is an uplink / downlink transmission channel, and this part can support division multiplexing scheduling of time division resources.

Time division multiple resource allocation:
In the uplink or downlink transmission channel, a time frequency resource allocated to each STA is referred to as a resource group.

Until. Of which

Is a bit

Indicates the corresponding decimal number.

Uplink downlink transmission channel resource scheduling:
Time division multiple resource allocation:
In STA signaling (Table 2)

Indicates an STA resource group start OFDM symbol index, and has a threshold value of 0 to 510.

Indicates the number of consecutive OFDM symbols occupied by the STA resource group.

  The resource group allocated to the STA includes the demodulated pilot occupation resource.

Transmission channel demodulation pilot This part can dynamically adjust the demodulation pilot graph. Signaling on control channel

(Table 2) can arrange each time domain pilot interval. Signaling on control channel

In Table 2, each frequency domain pilot graph can be arranged.

  Of Table 2

Is 01 or 10, the demodulated pilot needs to undergo precoding processing (dedicated demodulated pilot). Of Table 2

In the case of 00 or 11, no precoding processing (public demodulation pilot) is required for the demodulation pilot.

  The demodulated pilot graph is shown in Table 3.

Of which
(1) Pilot interval

Refers to the same space-time stream pilot symbol subcarrier period. For example:

Indicates that there is one demodulated pilot for every two adjacent applied subcarriers.

  (2) Number of pilot symbols,

, Indicates the number of consecutive OFDM symbols occupied by the demodulation pilot in the time domain.

  Table 4 shows the subcarrier positions to which each pilot symbol corresponds in the demodulated pilot graph.

  Of which

Is the first

Time-space stream demodulated pilot subcarrier index set.

Indicates an OFDM symbol occupied by the demodulation pilot. In the table

Is the demodulation pilot interval in the frequency domain, i.e.

Indicates.

  The demodulation pilot interval design is as follows.

  Signaling on control channel

In Table 2, each time domain pilot interval can be arranged and adapted to each radio transmission environment. Arrangement of time domain pilot intervals,

Ie:

One group demodulation pilot is inserted for each OFDM symbol.

Is short

,

Is long

. Long, short

Schedules with MAC layer BCF frames.

Demodulated preamble sequence The generator polynomial of the preamble sequence is

. Generation sequence is pilot symbol sequence via BPSK modulation

Get. The initial state of the register is:

  MSB is left, LSB is right.

Is the MAC address minimum 7 bits of CAP.

  Demodulation pilots are mapped to time-frequency resources according to the following rules. :

  In the formula:

Downlink transmission channel multi-antenna scheme:
In multi-antenna transmission mode,

The time domain baseband signals for the individual antenna ports are:

  In the formula:

Is the time domain window function,

Is the first

Number of spatial streams

Load symbol of subcarriers,

Is the precoding matrix

The first

line,

Column element.

The downlink multi-antenna transmission modes that can be supported in this part are as follows:
Mode 1: Open loop SU-MIMO
Mode 2: Closed loop SU-MIMO
Mode 3: Closed loop MU-MIMO
Of which
Mode 1: Open loop SU-MIMO
When open-loop SU-MIMO, STA can receive two codewords in parallel. Precoding matrix in open loop mode

Is a column orthogonal matrix, and

Mode 2: Closed loop SU-MIMO
During closed-loop SU-MIMO, the STA can receive two codewords in parallel and can also precode in subcarrier group units. The precoding matrix is defined as a packet: the number of pre-code division groups of the applied subcarrier is

The second

The subcarrier introductory set within each group is

This group uses a similar precoding matrix.

  In SU-MIMO mode, the number of subcarriers in the same prior code division group

Is determined by the following formula.

  Of which

See Attachment B for definition. For pre-code split groups:

The numbers are 1 and 22.

4 subcarrier groups:
[-115, -113] [-112, -109] [-108, -105] [-104, -11] [-100, -97] [-96, -93] [-92, -89] [ -88, -85] [-84, -81] [-80, -77] [-76, -73] [-72, -69] [-68, -65] [-64, -61] [- 60, -57] [-56, -53] [-52, -49] [-48, -45] [-44, -41] [-40, -37] [-36, -33] [-32 , -29] [-28, -25] [-24, -21] [-20, -17] [-16, -13] [-12, -9] [-8, -5] [-4, -1] [1,4] [5,8] [9,12] [13,16] [17,20] [21,24] [25,28] [29,32] [33,36] [37 , 40] [41, 44] [45, 48] [49, 52] [53, 56] [57, 60] [61, 64] [65, 68] [69, 72] [73, 76] [77 , 80] [81,84] [85,88] [89,92] [93,96] [97,100] [11,104] [10 5,108] [109,112] [113,115]

In case of 8 subcarrier groups:
[-115 ,,-105] [-104, -97] [-96, -89] [-88, -81] [-80, -73] [-72, -65] [-64, -57] [−56, −49] [− 48, −41] [− 40, −33] [− 32, −25] [− 24, −17] [− 16, −9] [− 8, −1] [ 1,8] [9,16] [17,24] [25,32] [33,40] [41,48] [49,56] [57,64] [65,72] [73,80] [ 81,88] [89,96] [97,104] [105,115]
In closed-loop SU-MIMO, the STA can schedule feedback channel information based on the MAC layer.

Mode 3: Closed loop MU-MIMO
In the case of closed loop MU-MIMO, each STA can receive only one codeword and precodes in units of subcarrier groups. The precoding matrix group definition is as follows. The number of pre-code division groups of applicable subcarriers is

The second

The subcarrier introductory set within each group is

This group uses a similar precoding matrix. In MU-MIMO mode, the number of subcarriers in the same precode division group

Is determined by the following formula.

  Of which

Table 2 shows the definitions. When using the MU-MIMO pre-code division group fed back based on CSI matrix,

The number is 1.

  In the case of closed loop MU-MIMO, the STA can schedule feedback channel information based on the MAC layer.

Uplink transmission channel multi-antenna scheme Uplink multi-antenna transmission modes that can be supported in this part are as follows:
Mode 1: Open loop SU-MIMO
Mode 2: Closed loop SU-MIMO
4. Signaling / feedback transmission channel Here, the corresponding signaling / feedback transmission channel is a channel for transmission signaling and / or feedback information.

  When the STA time resource is divided and multiplexed, it is shown in Table 2.

Traffic transmission in the STA resource group index

Transmission of group data and its demodulated pilot starts from the OFDM symbol.

Is

Indicates the corresponding decimal number. Of which

Is high,

Is low. OFDM symbol 0 to OFDM symbol in STA resource group

Is signaling or feedback transmission, and the transmission format is different from the scheduling described in Table 2. Table 5 shows the corresponding transmission format.

  In the signaling / feedback transmission, the traffic transmission resources assigned in Table 2 are divided and multiplexed, and dedicated signaling / feedback transmission resources can be assigned by the following cast signaling.

Downlink signaling / feedback transmission channel:
The DL signaling / feedback transmission channel multiplexes DL-TCH resources. As shown in FIG. All downlink signaling / feedback transmission channels have a total of one demodulation pilot.

Uplink signaling / feedback transmission channel:
The UL signaling / feedback transmission channel multiplexes UL-TCH resources. The uplink signaling / feedback transmission channel can correspond to two structures as shown in FIGS. 29 and 30, respectively. In FIG. 30 Format 2, each basic resource block is

(Excluding phase follow pilots). Among them, the front 4 OFDM symbols and the rear 4 OFDM symbols transition in the manner shown in the figure.

  Of these, the number of OFDM symbols occupied by the downlink signaling feedback channel is

The OFDM symbol with an index of 0 is a public demodulating pilot-occupied resource. The CRC definition is the same as in Table 1.

Signaling / feedback transmission channel assignment:
The CAP can allocate a signaling / feedback transmission channel to the STA via the signaling shown in Table 7.

Of which
Downlink signaling feedback transmission channel,

Schedules the first OFDM symbol of the corresponding STA downlink signaling feedback transmission channel,

Is an invalid scheduling in the downlink signaling feedback transmission channel public demodulation pilot.

  Uplink signaling feedback transmission channel format 1,

Schedules the first OFDM symbol of the corresponding STA uplink signaling feedback transmission channel,

The corresponding OFDM symbol is a demodulation pilot of this STA uplink signaling feedback transmission channel. Format 1,

Is invalid scheduling.

  Uplink signaling feedback transmission channel format 2,

Schedules the corresponding STA uplink signaling feedback transmission channel index,

Indicates signaling / feedback channel 0.

  Downlink signaling feedback transmission channel and uplink signaling feedback transmission channel format 1, each OFDM symbol is one signaling / feedback channel. Uplink signaling feedback transmission channel format 2, each resource block is one signaling / feedback channel.

5. Uplink Downlink Exploration Channel Downlink Exploration Channel:
Described in the system information field SICH

In this frame, the downlink exploration channel arrangement is shown. The downlink search channel schedules the specific position of the downlink transmission channel and the downlink search channel pilot graph in the MAC layer BCF frame.

Downlink exploration pilot graph:
The number of logic antenna ports that can be handled by downlink exploration channels is 1-8, and the pilot graph is as follows.

  Table 9 defines the subcarrier position to which each pilot symbol in the demodulated pilot graph corresponds.

  Of which

Is the first

A set of subcarrier indexes occupied by a single antenna port exploration pilot.

Is an OFDM symbol occupied by exploration pilots.

Generate a downlink exploration sequence:
The preamble sequence generator polynomial is

. Generation sequence is BPSK modulation and pilot symbol sequence

Get. The initial state of the register is:

  MSB is left, LSB is right.

Is the MAC address minimum 7 bits of CAP.

  The search pilot maps to the time-frequency resource according to the following rules. Order:

In the formula:

Uplink exploration channel Uplink exploration pilot port Table 10 shows the uplink exploration pilot ports.

Uplink exploration channel assignment
The CAP allocates an uplink search channel to the STA via the signaling shown in Table 11.

  Among them, the uplink search pilot port index schedules the search pilot port of the STA antenna 0. If the STA is multi-antenna arrangement, the other antenna uplink search pilot port index is according to the following formula:

  Of which

Is a bit

Indicates the corresponding decimal number.

Uplink exploration preamble sequence:
The preamble sequence generator polynomial is

. Generation sequence is pilot symbol sequence through BPSK modulation

Get. The initial state of the register is:

  MSB is left, LSB is right.

Is the MAC address minimum 7 bits of CAP.

  The uplink exploration pilot port set that CAP assigns to STA is:

Of which

Indicates a subcarrier index in Table 10.

Indicates the OFDM symbol index of Table 10.

Indicates the STA antenna port index.

Indicates an uplink search pilot port index. Uplink exploration pilots map to time-frequency resources according to the following rules: That is:

  In the formula:

6. Uplink scheduling request channel The uplink scheduling request signal is generated according to the method shown in FIG.

  In the figure, CAP_MAC indicates a minimum of 7 bits of the MAC address of the CAP.

Is the PN sequence index

Indicates.

Indicates a set of circular shift parameters.

Is the circular shift parameter index

Indicates.

Generation of PN sequence
PN sequence is a generator polynomial

Figure 2 shows the maximum long linear feedback shift register sequence. The block diagram is shown in FIG.

  Initial value of register

, MSB left, LSB right. Of which

Indicates the minimum 7 bits of the MAC address of the CAP.

Modulation mapping sequence

Is a sequence after modulation by BPSK

Get.

Subcarrier mapping sequence

Is a sequence by performing subcarrier mapping using the following formula:

Get.

Frequency domain cyclic shift Sequence after mapping to subcarrier

Is a sequence by performing a cyclic shift with the following formula:

Get.

  In the formula:

Is the IFFT score,

,

Is a cyclic shift parameter, and the unit is the number of sampling points. For 20MHz system,

,

Independent resource request frame resource allocation
The CAP allocates a UL-TCH resource occupied by the independent resource request frame to the STA through signaling shown in Table 12.

7. Uplink random access channel Random access signal generation Random access signal generation is the same as the uplink scheduling request signal. Sequence index number and cyclic shift index number of uplink random access signals

Are randomly selected by each STA.

Random access channel format:
Format 1 is shown in FIG.

  Format 2 is shown in FIG.

  Format 3 is shown in FIG.

Random access request frame resource allocation:
The CAP allocates a UL-TCH resource occupied by the random access request frame to the STA through signaling shown in Table 13.

  Among them, the scheduled time for sending is

, Unit: Number of samples. Early scheduled time is in units of 100nS. When the sampling clock is 20MHz,

Random access response frame resource allocation:
The CAP schedules the DL-TCH resource occupied by the random access response frame for the STA via the signaling shown in Table 14.

Uplink output control Open loop output control
In consideration of channel reciprocity of TDD system uplink and downlink, open loop output control is performed.

  In the formula:

: Estimated value of transmission path loss. Estimate by STA reception output and CAP transmission output. CAP transmission output is scheduled by MAC layer BCF frame.

: C / N ratio supported by different MCS.

: Transmission bandwidth allocated by CAP to STA.

  Closed loop control:

Example 15
The embodiment of the present invention provides a resource scheduling method. Used for scheduling of signaling and / or feedback transmission resources. The details are as follows.

  Procedure 1: Generate signaling, and attach scheduling information of resources used for signaling and / or feedback transmission in the user resource group to the corresponding signaling. The corresponding user resource group is used for user traffic data transmission.

  Procedure 2: Send corresponding signaling.

  Among them, information indicating the start address and size of the user resource group is attached to the corresponding signaling.

  In the embodiment of the present invention, it is used for division multiplexing of signaling and / or feedback transmission resources and user transmission resources. According to resource scheduling, a division multiplexing of a signaling feedback channel and a transmission channel is adaptively arranged. See Table 2 for signaling formats.

Index traffic transmission from STA resource group

It is scheduled to transmit the group data and its demodulated pilot from the OFDM symbol.

Is

Is the corresponding decimal number. Of which

Is high,

Is low. Details are shown in FIG. Within user resource group, OFDM symbol 0 to OFDM symbol

Is used for signaling or feedback transmission. Index from STA resource group

The group data and its demodulated pilot are transmitted from the OFDM symbol.

  When signaling and / or feedback information is transmitted, transmission is performed based on the signaling and / or feedback transmission format promised by both terminals.

  In order to realize the resource scheduling method described above, the embodiment of the present invention also provides resource scheduling equipment. The details are as follows.

  The package module attaches information indicating the resource used for signaling and / or feedback transmission in the user resource group to the generated signaling used for, and the corresponding signaling. The corresponding user resource group is user traffic data transmission.

  The transmission module is used for transmitting the corresponding signaling.

  Among them, information indicating the start address and size of the user resource group is attached to the corresponding signaling.

  Among them, the corresponding signaling is scheduled to be transmitted according to the default signaling and / or feedback transmission format.

  Adaptably, the embodiment of the present invention provides a data transmission method. Used to receive the above signaling. Transmit based on this. The details are as follows.

  Procedure 1: Receive signaling and attach scheduling information of resources used for signaling and / or feedback transmission in the user resource group to the corresponding signaling. The corresponding user resource group is used for user traffic data transmission.

  Procedure 2: Used to transmit signaling and / or feedback messages at a position corresponding to the user resource group according to the corresponding scheduling information.

  Among them, when data is transmitted, it is transmitted based on a default signaling and / or feedback transmission format.

  In order to realize the above-described data transmission method, the embodiment of the present invention provides a data transmission device. The details are as follows.

  The receiving module is used for receiving signaling. Information indicating resources used for signaling and / or feedback transmission in the user resource group is attached to the corresponding signaling. The corresponding user resource group is used for transmission of user traffic data.

  The transmission module is used to transmit signaling and / or feedback messages at a corresponding position in the user resource group according to the corresponding scheduling information.

  Among them, the corresponding transmission module is used for transmission based on a default signaling and / or feedback transmission format.

Example 16
The embodiment of the present invention provides a resource scheduling method. Used for scheduling of signaling and / or feedback transmission resources. The details are as follows.

  Procedure 1: The first signaling is generated and used for information indicating signaling and / or feedback transmission resources in the corresponding first signaling.

  Procedure 2: The corresponding first signaling is transmitted.

  Of these, the start address and size are included in the resource information of the corresponding scheduling signaling and / or feedback transmission.

  Among them, the format is included in the resource information of the corresponding scheduling signaling and / or feedback transmission. The corresponding format is a method for scheduling resource division multiplexing.

  Among them, the corresponding resource division multiplexing method is divided into time division multiplexing, frequency division multiplexing, time frequency division multiplexing, or code division multiplexing.

  Among them, scheduling information and / or feedback transmission resource information includes scheduling a subchannel or a subcarrier to be applied to the first signaling in a spectrum superposition mode.

Includes steps 3 and 4 after step 2 above:
Procedure 3: Generate second signaling, and attach information for assigning signaling and / or feedback transmission resources to the corresponding second signaling. Scheduling resources for signaling and / or feedback transmission allocated to each user.

  Procedure 4: The corresponding second signaling is transmitted.

  Among them, the information of the allocated signaling and / or feedback transmission resources includes one or a plurality of user indication STAIDs and the start address and size of the corresponding signaling and / or feedback transmission resources of the corresponding STA.

  Of these, the STAID is used for the sole 1STA display.

  Of these, STAID or cast ID may be displayed. The corresponding cast ID display is a common ID display of all STAs, and each STA receives corresponding signaling via the cast ID display.

  Among them, the STA size is scheduled based on the number of signaling and / or feedback channels occupied by the STA. The unit size of each signaling and / or feedback channel is one OFDM symbol (mode 1, ie time division multiplexing) or one unit resource block (mode 2, ie time frequency division multiplexing).

  In the embodiment of the present invention, signaling and / or feedback transmission resources and user transmission resources are independent. Specifically, Table 6 shows the first signaling related to the embodiment of the present invention. The second signaling is shown in Table 7. This corresponds to the two transmission modes shown in FIGS.

  In order to realize the above-described resource scheduling method, the embodiment of the present invention provides a resource scheduling device. The details are as follows.

  The first package module is used for generating the first signaling. Information indicating signaling and / or feedback transmission resources is attached to the corresponding first signaling.

  The first transmission module is used for transmission of the corresponding first signaling.

Of these, the start address and size are included in the resource information of the corresponding scheduling signaling and / or feedback transmission.
Among them, the format is included in the resource information of the corresponding scheduling signaling and / or feedback transmission. The corresponding format is a method for scheduling resource division multiplexing.

  Among them, the resource division multiplexing scheme is divided into time division multiplexing, frequency division multiplexing, time frequency division multiplexing, or code division multiplexing.

  Among them, scheduling information and / or feedback transmission resource information includes scheduling a subchannel or a subcarrier to be applied to the first signaling in a spectrum superposition mode.

The above resource scheduling equipment includes the following:
The second package module is used to generate second signaling. The corresponding second signaling includes information used for signaling and / or feedback transmission resources. Scheduling signaling and / or feedback transmission resources to allocate for each user.

  The second transmission module is used for transmitting the corresponding second signaling.

  Among them, one or a plurality of user indication STAIDs in the information of the allocated signaling and / or feedback transmission resource, and the corresponding STA includes a start address and a size described in the corresponding signaling and / or feedback transmission resource.

  Among them, the corresponding STAID is used for only one STA displayed.

  Among them, the corresponding STAID is also a cast ID display.

  Among them, the size of the corresponding STA is scheduled by scheduling the number of signaling and / or feedback channels occupied by the corresponding STA. The unit size of each signaling and / or feedback channel is one OFDM symbol (mode 1 is shown in FIG. 29) or one resource block (mode 2 is shown in FIG. 30).

  In the embodiment of the present invention, each STA shares uplink transmission resources through time division, frequency division, code division, space division, or a combination of the above division multiplexing schemes.

  The specific order or steps of the steps in the disclosure are examples of exemplary methods. It should be understood that on a design preference basis, the specific order or steps of the steps in the process can be allocated anew without leaving the scope of protection of the present disclosure. The method claims in the claims include elements of each step in an exemplary order, but are not limited to the specific order or steps described.

  In the foregoing detailed description, each feature is combined with a signal embodiment to simplify the present disclosure, but such disclosed methods are not described to reflect the intent below, ie, the required protection. Embodiments of the subject matter are more than the features explicitly recited in each claim. Conversely, as reflected in the appended claims, the invention resides in less than all features of the disclosed signal embodiments. For this reason, the appended claims are particularly clearly merged into the detailed description, each of which is independently a preferred technical solution for the present invention.

  What has been described above includes examples of one or more embodiments. Of course, to explain the above embodiments, it is not possible to describe all possible combinations of parts or methods, but it should be understood that those skilled in the art can further combine and arrange the embodiments. For this reason, the embodiments described herein include all such changes, modifications and variations within the scope of protection of the appended claims. In addition, as to the term “include” used in the specification or the claims, the expression method of the term is similar to the term “include”, and in the claims, as “include” described in connection terms It is. In addition, the term “or” in the claims and the specification means “non-exclusive or”.

Claims (56)

A wireless communication system,
Its features are
One center access point CAP,
At least one site STA communicating with the CAP;
With
The center access point CAP determines a current physical frame structure based on a scheduled transmission resource, and transmits information indicating the structure to the current physical frame,
The site STA determines the current physical frame structure based on information indicating the current physical frame structure in the current physical frame;
Among them, the length of each physical frame is determined by its structure and is a non-fixed value. Network equipment,
Its features are
Including an arrangement unit and a first communication unit;
The placement unit determines a current physical frame structure based on scheduled transmission resources;
The first communication unit transmits information indicating a current physical frame structure in a current physical frame, communicates with at least one terminal device;
Transmitting information indicating the current physical frame structure in the current physical frame, communicating with at least one terminal device,
Among them, each physical frame length depends on the structure and is a non-fixed value. The network device according to claim 2,
The structure for determining the current physical frame structure is specifically:
A synchronization preamble sequence and a system information channel for information indicating the current physical frame structure are arranged in the current physical frame. The network device according to claim 3, wherein
The first communication unit transmits the preamble sequence, and transmits information indicating the current physical frame structure on the system information channel. The network device according to claim 2,
The structure for determining the current physical frame structure is specifically:
A synchronization preamble sequence and a system information channel of information indicating a current physical frame structure are arranged in a current physical frame, and at least one of a plurality of channels is selectively arranged in a current physical frame And The network device according to claim 5, wherein
The plurality of channels are:
A first downlink transmission channel for transmitting downlink traffic and / or downlink signaling and / or uplink traffic feedback; a downlink search channel for transmitting a downlink search signal; and downlink traffic; And / or a downlink signaling and / or a second downlink transmission channel for transmitting uplink traffic feedback. The network device according to claim 6, wherein
The first communication unit transmits a preamble sequence, transmits information indicating a current physical frame structure on a system information channel, and performs related transmission on a selectively arranged channel. The network device according to claim 6, wherein
A structure for determining a current physical frame structure is characterized in that a control channel for transmitting information indicating a transmission format of a channel that occupies transmission resources is allocated and scheduled in the current physical frame. . The network device according to claim 8, wherein
The first communication unit transmits the preamble sequence, transmits information indicating a current physical frame structure in a system information channel, and allocates and schedules transmission resources in the control channel, and uses a transmission resource. Transmit information indicating the transmission format,
It is characterized in that the related transmission is carried out on the selectively arranged channels. The network device according to claim 8, wherein
The first communication unit transmits a preamble sequence, transmits information indicating a part of a current physical frame structure in the system information channel, and includes at least a length of time of the control channel, and includes other information in the control channel. Transmitting information indicating the current physical frame structure of the part, transmitting transmission resource allocation and scheduling in the control channel, and information indicating the transmission format of the channel occupying the transmission resource,
It is characterized in that the related transmission is carried out on the selectively arranged channels. The network device according to claim 8, wherein
The control channel and the system information channel are characterized in that resources are divided and multiplexed by any one of time division multiplexing, frequency division multiplexing, code division multiple access, or a combination method. The network device according to claim 5, wherein
The multiple channels include an uplink search channel for transmitting an uplink search signal, an uplink scheduling request channel for transmitting an uplink scheduling request, uplink traffic, and / or uplink signaling, and / or Comprising an uplink transmission channel for transmitting downlink traffic feedback and / or downlink CQI feedback and / or downlink CSI feedback and an uplink random access channel for triggering new user access And The network device according to claim 5, wherein
The multiple channels include an uplink search channel for transmitting an uplink search signal, an uplink scheduling request channel for transmitting an uplink scheduling request, uplink traffic, and / or uplink signaling, and / or Uplink transmission channel for transmitting downlink traffic feedback, CQI feedback channel for transmitting downlink CQI feedback, CSI feedback channel for transmitting downlink CSI feedback, and for triggering new user access And an uplink random access channel. The network device according to claim 12 or 13,
The first communication unit transmits a preamble sequence and transmits information indicating a current physical frame structure in a system information channel;
It is characterized in that the related reception is performed on the selectively arranged channels. The network device according to claim 12 or 13,
A structure for determining a current physical frame structure is characterized in that a control channel for transmitting information indicating a transmission format of a channel that occupies transmission resources is allocated and scheduled in the current physical frame. . The network device according to claim 15,
The first communication unit transmits the preamble sequence, transmits information indicating a current physical frame structure on a system information channel, and allocates and schedules transmission resources on a control channel and transmits a channel that occupies transmission resources. Information indicating the format is transmitted, and related reception is performed on channels that are selectively arranged. The network device according to claim 15,
The first communication unit transmits the preamble sequence, transmits information indicating a part of a current physical frame structure in a system information channel, and includes at least a length of time of a control channel, Sends information indicating the current physical frame structure of other parts, transmits transmission resource allocation and scheduling on the control channel, and information indicating the transmission format of the channel occupying the transmission resource,
It is characterized in that the related reception is performed on the selectively arranged channels. The network device according to claim 15,
The control channel and the system information channel are characterized in that resources are divided and multiplexed by any one of time division multiplexing, frequency division multiplexing, code division multiple access, or a combination method. A terminal device,
Its features are
Including an analysis unit and a second communication unit;
The analysis unit analyzes information indicating a current physical frame structure in a current physical frame to determine a current physical frame structure;
The second communication unit 32 communicates with a network device in a current physical frame,
Among them, each physical frame length depends on its structure and is a non-fixed value. The terminal device according to claim 19,
The current physical frame includes a preamble sequence and a system information channel having information indicating a current physical frame structure. The terminal device according to claim 20,
The second communication unit receives the preamble sequence and receives information indicating a current physical frame structure through a system information channel. The terminal device according to claim 19,
The current physical frame includes a preamble sequence, a system information channel having information indicating a current physical frame structure, and at least one selectively arranged channel. The terminal device according to claim 22,
The selectively arranged channels include an uplink search channel for transmitting an uplink search signal, an uplink scheduling request channel for transmitting an uplink scheduling request, uplink traffic, and / or an uplink. An uplink transmission channel for transmitting signaling and / or downlink traffic feedback, and / or downlink CQI feedback, and / or downlink CSI feedback, and an uplink random access channel for triggering new user access; It is characterized by including. The terminal device according to claim 22,
The selectively arranged channels include an uplink search channel for transmitting an uplink search signal, an uplink scheduling request channel for transmitting an uplink scheduling request, uplink traffic, and / or an uplink. Uplink transmission channel for transmitting signaling and / or downlink traffic feedback, CQI feedback channel for transmitting downlink CQI feedback, CSI feedback channel for transmitting downlink CSI feedback, and new users And an uplink random access channel for triggering access. The terminal device according to claim 23 or 24,
The second communication unit receives a preamble sequence and receives information indicating a current physical frame structure in a system information channel;
It is characterized in that the related transmission is carried out on at least one selectively arranged channel. The terminal device according to claim 23 or 24,
The uplink random access channel, the uplink transmission channel, and the uplink scheduling request channel divide and multiplex resources by any one of time division multiplexing, frequency division multiplexing, code division multiple access, or a combination scheme. The terminal device according to claim 23 or 24,
The current physical frame structure further includes a control channel for transmitting information indicating a transmission format of a channel occupying the transmission resources, scheduling and transmission resources. The terminal device according to claim 27,
The second communication unit receives a preamble sequence, receives information indicating a current physical frame structure on a system information channel, and allocates and schedules transmission resources on a control channel, and a transmission format of a channel that occupies transmission resources Receive information indicating
It is characterized in that the related transmission is carried out on at least one selectively arranged channel. The terminal device according to claim 27,
The second communication unit receives a preamble sequence, receives information indicating a part of a current physical frame structure in a system information channel, and includes at least a length of time of a control channel, Receiving information indicating the current physical frame structure of the part, receiving transmission resource allocation and scheduling in the control channel, and information indicating the transmission format of the channel occupying the transmission resource,
It is characterized in that the related transmission is carried out on at least one selectively arranged channel. The terminal device according to claim 22,
The selectively arranged channel includes a first downlink transmission channel for transmitting downlink traffic and / or downlink signaling and / or uplink traffic feedback, and for transmitting a downlink search signal. Including a downlink search channel and a second downlink transmission channel for transmitting downlink traffic and / or downlink signaling and / or uplink traffic feedback. The terminal device according to claim 30, wherein
The second communication unit receives a preamble sequence and receives information indicating a current physical frame structure in a system information channel;
Relevant reception is performed on at least one selectively arranged channel. The terminal device according to claim 30, wherein
The current physical frame structure further includes a control channel for transmitting information indicating a transmission format of a channel occupying the transmission resources, scheduling and transmission resources. The terminal device according to claim 32,
The second communication unit receives a preamble sequence, receives information indicating a current physical frame structure on a system information channel, and allocates and schedules transmission resources on a control channel, and a transmission format of a channel that occupies transmission resources Receive information indicating
Relevant reception is performed on at least one selectively arranged channel. The terminal device according to claim 32,
The second communication unit receives a preamble sequence, receives information indicating a part of a current physical frame structure in a system information channel, and includes at least a length of time of a control channel, Receiving information indicating the current physical frame structure of the part, receiving transmission resource allocation and scheduling in the control channel, and information indicating the transmission format of the channel occupying the transmission resource,
Relevant reception is performed on at least one selectively arranged channel. The device according to claim 2 or 19,
The information indicating the current physical frame structure includes information indicating the existence of the first channel. The terminal device according to claim 35,
The first channel is a downlink search channel for transmitting a downlink search signal. The device of claim 36.
The information indicating the current physical frame structure includes information indicating a time length of the second channel, and the time length of the second channel is zero or more. The device of claim 37.
The second channel may be a downlink transmission channel or an uplink transmission channel. 36. The apparatus of claim 35.
The first channel is an uplink random access channel for triggering a new user access. The device according to claim 2 or 19,
The information indicating the current physical frame structure includes information indicating the existence of the first channel and the length of time. 41. The device of claim 40, wherein
The first channel is an uplink scheduling request channel for triggering uplink transmission resource scheduling. 41. The device of claim 40, wherein
The first channel is an uplink search channel for transmitting an uplink search signal. The device of claim 42,
The information indicating the current physical frame structure includes information indicating a time length of the second channel, and the time length of the second channel is zero or more. 44. The device of claim 43, wherein
The second channel may be a downlink transmission channel or an uplink transmission channel. The device according to claim 2 or 19,
The information indicating the current physical frame structure includes information indicating a time length of the first channel, and the time length of the first channel is not less than zero. The device of claim 45, wherein
The first channel is a control channel for transmitting information indicating a transmission format of a channel allocating and scheduling transmission resources and occupying transmission resources. The device of claim 45, wherein
The first channel is a downlink transmission channel. 48. The apparatus of claim 47.
The information indicating the current physical frame structure includes information indicating the existence of the second channel and the length of time. 49. The device of claim 48, wherein
The second channel is an uplink search channel for transmitting an uplink search signal. 48. The apparatus of claim 47.
The information indicating the current physical frame structure includes information indicating the existence of the second channel. 51. The device of claim 50, wherein
The second channel is a downlink search channel for transmitting a downlink search signal. The device of claim 45, wherein
The first channel is an uplink transmission channel. 53. The device of claim 52, wherein
The information indicating the current physical frame structure includes information indicating the existence of the second channel and the length of time. 54. The apparatus of claim 53.
The second channel is an uplink search channel for transmitting an uplink search signal. 53. The device of claim 52, wherein
The information indicating the current physical frame structure includes information indicating the existence of the second channel. The device of claim 55,
The second channel is a downlink search channel for transmitting a downlink search signal.

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